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Asian Church should become ‘more Asian, less Roman’

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(UCAN)The Churches in Asia need to seize the moment to stress the Asianness of the Church as Pope Francis encourages Church communities to become more grounded through continental contextual theologies, says Redemptorist Father Vimal Tirimanna, one of Asia’s leading theologians.The 67-year-old professor of theology at the Pontifical Accademia Alfonsiana in Rome says the Federation of Asian Bishops’ Conference (FABC) should build on the theological foundations laid by yesteryear Asian theologians.

The priest, also a member of the Theological Commission of the General Secretariat for the Synod 2021-2024,  also believes the synodal process will change “the Church upside down” if the process is taken seriously. Father Tirimanna spoke with UCA News on Oct. 20 on the sidelines of FABC’s first general conference (Oct.12-30) organized in Bangkok as part of its golden jubilee celebrations. Excerpts from the interview:

Q: What do you think the FABC has achieved in its 50 years?

A: The Federation of Asian Bishops’ Conference has a very good foundation thanks to our forefathers, who worked for it in the 1970-80s. We are celebrating 50 years now and I think we should get inspiration from those pioneers. Of course, we cannot go back and should not go back literally to what they were because the world has changed, and realities have changed. We should move on based firmly on the foundation they have already laid.

The essence they gave is the Asianness of the Church. Otherwise, tell me why should we meet as the FABC here. If we are not here to build on that essence of Asianness, it is all a waste of money, time and energy. We should cherish and develop a sense of Asianness in every aspect of the Church paying attention to the contemporary signs of the times. That, I believe, is the meaning of the existence of the FABC.

The FABC should continue to work. Let me be specific. We need to be Asian but as things stand today, the Church in Asia is not yet fully Asian. The FABC should continue to work and it has a lot of ground to cover. In the initial three decades of the FABC, it was bubbling with Asianness. But that Asianness has been gradually waning.

However, we cannot and should not go back to the 1970s and 1980s. We have to face today’s reality and respond. Today’s Asia is not the Asia of the 1970s or of the 1980s. So we have to be Asian according to today’s Asia.

Q: Is a fully Asian Church even possible?

A: We have to be Asian, otherwise, we don’t need an FABC. Take for example the Latin American CELAM (the FABC equivalent in South America). It is through and through Latin American. And the FABC trails behind it. But as things stand, the reality is there is not much of a difference between European theology and the FABC’s theology. Of course, I’ll be too naive to say that as a blanket statement. Certainly, there are certain Asian elements in our Churches. It’s there … but much reduced. We can be more Asian, that’s what I am saying.

Q:Why is the Asian Church attempting to reduce its Asian elements?

A: Frankly speaking, I don’t think that the Asian Church is consciously attempting to reduce her Asianness. However, the reasons for the lack of enthusiasm for being Asian can be traced to the pontificates of Papa Wojtila and Papa Ratzinger that perceived relativism as the major issue the Church has to respond to. During that time, most Asian bishops were trying to follow the Roman agenda, for obvious reasons. That’s what Rome wanted. The freedom, which Paul VI gave, what Vatican II gave, was not there. Pope Paul VI allowed and encouraged the openness and freedom to be Asian, to be theologizing in the Asian way. But in the later decades, we see it being taken away little by little, little by little.

With the arrival of Pope Francis, we have gained much more space to be Asian because he’s a Third-World man who would surely understand what it means to be in the Third World. He was the cardinal Archbishop of Buenos Aires in Argentina.

Secondly, he’s promoting contextual theology. So, this is our Asian moment. We need to seize it. But I’m sorry to say I don’t see the enthusiasm and energy to do that. We can do much more than what we are doing because this is our moment. If we lose this, I wonder whether God will give us another moment like this.

Q:What do you mean by contextual theology?

A: Any theology should help Christians to understand and respond to their faith in their own histories, in their daily life, in their culture, and in their socio-political nuances. These realities in Asia provide us with our context, and these realities are completely different from any other part of the world. Continental contextual theologies are local theologies to be developed as a faith-response to these continental realities. Roman or European theology will not be able to understand and respond to our realities in all their complexities. What we need is an Asian theology.

Vatican II has given us the freedom to develop these contextual theologies. This is the moment for us. I’m so happy that I’m living in this moment. I’m very hopeful about this space and freedom which Pope Francis reiterates. But will we use that space and the freedom to continue to build an Asian theology? I’m not sure. At the same time, I say this with a certain amount of hope. But I would have loved to have more inspiration from an Asianness than what we see today.

Q:How will the universal Church benefit from these contextual theologies?

A: One of the finest theological elements which the FABC developed and contributed to the universal Church was the theology of inter-religious relations. The first document of the FABC Theological Advisory Commission was trying to understand how Christians could practice their faith without negating or looking down upon the beliefs of other religions in Asia, following the guidelines given by Vatican II.

I want to mention the names of a few Asian theologians here, who worked hard to lay the foundations for the FABC’s theology — Father Felix Wilfred from India and Jesuit Father Catalano Arevalo from the Philippines. I also remember Jesuit Father Aloysius Pieris of Sri Lanka. We may have differences of opinion with them. For example, I may not agree as a bishop with certain views they hold but their work for the FABC was seminal and indispensable.

Their main common point was that there are three main living realities in Asia: religions, cultures, and the poor. These founding fathers of FABC theology, of course, together with the pioneer FABC bishops, considered that Christian existence in Asia can be appreciated only through triple dialogue — with religions, cultures and the poor. These triple realities characterized Asia in the seventies, and they continue to characterize Asia even today and that will characterize Asia even tomorrow.

After all, our major Asian religions are here to stay. Whatever our other problems are, we are very religious still in Asia. Secondly, cultures. We are still culturally conditioned people more than any other non-Asian country, probably some African nations may be exceptions. Thirdly, our poor. They are not going to go off in the near future. So the dialogue with these three living Asian realities is a must. Of course, in our globalized world, all these are becoming social realities in many other parts of the world too. Asia is typically characterized by them.

I believe FABC will somehow regain its theological prominence because I believe in the active presence of the Holy Spirit. Otherwise, a conference like this will not have happened, a hope like this will have never been lit. However, I also think that we lack daring theologians of the caliber of those, who were there at the foundation. We don’t have them today. Simple as that. We have theologians who mostly repeat what the early Asian theologians said, or what the Vatican is saying. We do not have theologians who can take Asian theology forward, but I believe that the Holy Spirit will lead the FABC in His own way.

Q:What should be their priorities in this journey forward?

A: We have newer issues that beg for theological engagement here in Asia. We should have more time for dialogue with women, youth, and the environment. But please don’t put those dialogues on par with the triple dialogue because the triple dialogue is what gives us our Asianness our Asian identity in theologizing. 

Environmental issues are here as they are in other parts of the world. Issues of women and youth are also global. We should not lose what characterizes us. Have a dialogue with everybody, but let’s be Asian. If you are not focused well, everything becomes important even with regard to dialogue. That means nothing is important. Have a dialogue but don’t say they are Asian issues alone. But the issues of women in Asia are not that of Europe. So European solutions will not help Asian women. I think I have made my point clear.I am in the Theological Commission, and Pope Francis is interested in Asian Churches. All the national episcopal synodal reports I read last month in Frascati together with my colleagues spoke about the role of women in the Church.

Here, I think of the report from Sri Lanka, which pleasantly surprised me as it said, women are the lifeblood of the Church in Sri Lanka. So we should give them more place, much more than now in ecclesial life. All that is true. But for heaven’s sake don’t copy North American and European women’s agenda and bring it here. For example, women’s ordination. Is it an Asian issue? I’m asking that question. I won’t say anything more. Are not women’s social subjugation, their oppression, and man-dominated societies in Asia typically our Asian issues? We also have issues of pushing women to be migrant workers in foreign lands.



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Proxy wars make unsettling comeback

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Russian armed forces in Ukraine

It’s the day of the North-East proxy war all over again. Concrete proof that this is so comes in the form of the latest military aid package approved for Ukraine by the Biden administration running into $60 billion. So substantial is this injection of assistance that it has prompted Ukrainian President Volodymyr Zelenskyy to see it as pointing to a “chance of victory”.

To the extent to which the West sees some of its best interests, such as the right to self- determination, being eroded in the Ukraine, to the same degree could the latter’s efforts to protect its independence against the Russian invasion be seen as a proxy war where the West pits itself indirectly against the East, in the form of Russia.

Only time will tell whether Zelenskyy is right in seeing the emergence of a “chance of Victory”, now that the much hoped for aid has arrived from the West, but increasingly sizeable and sophisticated arms for Ukraine foreshadow a further prolongation of the wasting war in the Ukraine. While the Russian armed forces would need to brace for an escalating and more destructive confrontation in the Ukraine, the civilians on both sides of the divide should see themselves as being placed ‘on the firing line’ as never before. Overall, the human costs of war would prove staggering.

To make matters far worse for the Russian side, the UK government too has weighed in with an aid package for Ukraine to the tune of Sterling Pounds 500 million, making the prospect of bringing early relief to the relevant suffering publics by the international community a very distant one, since the war in the Ukraine would be stepped-up several fold as a result of the influx of more arms.

It would not be irrelevant, at this juncture, to take the minds of Russia’s rulers to their Cold War failure in Afghanistan. There was nothing to gain from the long-running Afghan quagmire for both sides to the conflict. The USSR’s failed military intervention left behind an Afghanistan which has wilted in the grip of big power rivalries over the decades.

However, Afghanistan was the last of a number of Cold War era proxy wars which rendered the world an increasingly dangerous place for the majority of its peoples. We are not seeing a Cold War type ideological confrontation in the Ukraine, but it is an open question whether the Russian people, for instance, are gaining anything substantial from the war right now.

The Ukraine situation, though, points to the primacy of sovereignty and issues flowing from it in these post-Cold War times. What Ukraine impresses on ambitious global powers is the impossibility of waging colonial era type military interventions in particularly the global South at present. Ukraine, under President Zalenskyy, has decided to fight back the Russian invasion tooth-and-nail and the likelihood is that there would be no clear winners from this war of attrition.

An independent country which is committed to protecting its sovereign rights has no choice but to fight back forces that are intent on destroying it and this is the task that Ukraine has set for itself right now.

On the other hand, the Russian political and military establishments are in an effort to revive the colonial project in Ukraine, which is a preposterous proposition in the present global political order which is gravitating towards political and economic liberalization. Given this backdrop it is small wonder that the West and its military arm, NATO, are firmly behind Ukraine.

Not surprisingly, the West is seeing in the Russian invasion of Ukraine a flagrant violation of all the political values that it claims to uphold and protect. There is no turning back on the moves towards political and economic liberalization that characterize the current neo-liberal age.

Moreover, by invading Ukraine it could be said that Russia is in an attempt to take the world back to some of the earliest stages in the development of modern day capitalism. Besides, if Russia’s reasons for invading Ukraine are to be accepted, any bullying big power could consider itself justified in invading its smaller neighbours, which it sees as coming under its suzerainty.

Accordingly, the world is in for a long-running East-West proxy war in the Ukraine. However, the world’s security worries would in no way end with the Ukraine because it also has other major concerns in the form of the Middle East blood-letting and the Taiwan Straits, in addition to those parts of Africa that are continuing to be weighed down by inter and intra-state turmoil.

In the Middle Eastern theatre and in the Taiwan Straits, intervention by the West is bound to continue and intensify because the latter sees some its crucial interests as being threatened in the relevant regions. Despite its keenness to extend humanitarian assistance to the war-affected populations in the Gaza, the US remains committed to protecting Israel’s best interests.

Such concern has heightened in the wake of the current hostilities between Iran and Israel. It would be in the US’ interests to keep Iran in check because the latter is a threat to Israel as well as to the West’s oil and energy supplies. Accordingly, the US would be going the extra mile to ensure Israel’s security while preventing Iran from being too great a military and political power in the Middle East.

The US could work towards the latter aims by constantly arming Israel and ensuring that the military balance in the region is constantly in favour of Israel rather than its foes’. Here too, then, is an ongoing proxy war between the West and the East; the latter taking the form of Iran which is backed by China and Russia.

Another potentially destructive proxy war between West and East is, meanwhile, working itself out in the Taiwan Straits. The US has over the years been seeing itself as a natural ally of Taiwan because the latter is a capitalist outpost in South East Asia as well as being viewed as an adversarial, break-way state by China. In its efforts to contain the power of China in Asia, the US has been seeing it to be in its interests to ensure the security of Taiwan as against China’s growing regional predominance. All this works out to more Western military aid to Taiwan, going forward.

Accordingly, proxy wars between West and East are once again surfacing unsettlingly in international politics. Military budgets of Western powers are set to grow at the expense of welfare budgets. Needless to say, the latter trend will eventually result in growing public unrest and anger towards governments.

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Artificial Intelligence: Are we getting into it with our eyes open? – Part II

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by Prof. Janendra De Costa

Senior Professor and Chair of Crop Science, Faculty of Agriculture, University of Peradeniya

How prepared is Sri Lanka for AI?

With the initiative coming from the very top, it is likely that AI will come to the fore at least in the official documents on development strategy and policy in the near future. As promised by the Minister of Education, AI is likely to make its way in to school curricula as well. Being an election year, there is a good possibility that the manifestos of all mainstream political parties in Sri Lanka will carry statements about promoting AI. Therefore, it is pertinent to ask whether Sri Lanka has the pre-requisites for successful adoption of AI in its key sectors and whether AI can be included in the school curricula from next year onwards. While confessing to be a non-expert in AI, my view, as an educator, researcher and a practitioner of Science is that Sri Lanka needs a substantial effort to first build a foundation for successful adoption of AI.

First and foremost, Sri Lanka lacks the human capital, an adequate number of trained personnel and practitioners in AI. The considerable exodus of experts in computer science and related technologies since the 2022 economic collapse and its repercussions in the aftermath have left the country significantly impoverished in terms of expertise in almost all established disciplines. The scarcity of experts would be even more acute in new, emerging disciplines such as AI. When the President and the Minister of Education talks about including AI in the school curricula, it is doubtful whether they have considered the availability adequately trained teachers to teach AI in schools or whether there has been adequate preparation in terms of computer facilities, textbooks (printed or electronic) and other learning resources.

Secondly, the past record of adopting new, emerging technologies in Sri Lanka tells us that the tendency will, most probably, be to adopt AI tools developed elsewhere with algorithms trained on data collected elsewhere. Only a small minority of the Sri Lankan experts is likely to take the considerably more difficult pathway of developing our own AI tools and training them on data collected specifically in a Sri Lankan context. As mentioned earlier in this article, the big, comprehensive data sets on which to train AI algorithms do not exist at present in most of the key areas where AI could make a significant positive contribution to national development of Sri Lanka. With the present and past levels of government investment on R & D in S & T (Sri Lanka with only 0.1% of its GDP invested in Science and Technology ranks among the lowest in the world in this index), there is little hope that there will be adequate and sustained support to develop our own AI tools to tackle the specific development needs of higher priority to Sri Lanka. The argument that why spend so much to develop our own AI tools when those already developed elsewhere are available will readily come from the government officials, especially those in the treasury, who have little understanding of how advancements in S & T take place via R & D.

Sri Lanka’s previous experiences in adopting new, emerging technologies

While we are about to embark on a journey to integrate AI into our national agenda, it is worth noting how similar initiatives in the past to integrate new, emerging technologies have fared. In this regard, the story of nanotechnology is especially relevant and offers valuable lessons. Nanotechnology in Sri Lanka was first promoted around 2005 as a technology that carried enormous promise for Sri Lanka to propel itself to the next level economic development via production of globally competitive nanoproducts. The initiative was spearheaded by the newly appointed Minister of Science and Technology, who was himself a former scientist and a former director of a state-sector research institute. The argument at the time was that Sri Lanka should invest its limited financial, infrastructural and humany resources on R & D in a few high potential areas rather than spreading it across all disciplines. Nanotechnology and biotechnology were the high-potential areas that were identified. The Sri Lanka Institute of Nanotechnology (SLINTEC) was established with state-of-the-art facilities on par with those available in developed countries and a select group of scientists from Sri Lanka and a few expatriate Sri Lankan scientists were employed on remuneration packages which were far superior to that enjoyed by the scientists in state sector R & D institutions. The initial funding came from a public-private partnership between the government and a few private sector organizations. It is worth noting that to provide its share of the venture, the National Science Foundation, the premier government organization that was funding S & T research in Sri Lanka diverted all its allocation for research from the treasury to the SLINTEC, thereby depriving research funding to all other areas of Science and Technology for a few years. To cut a long story short, today, after nearly 20 years, the expected nanotechnology boom along with the globally-competitive nanoproducts and the projected increase in the national GDP have not materialized while the SLINTEC, with all its state-of-the-art facilities barely survives, struggling to sustain itself financially, with all its expatriate Sri Lankan scientists gone back to their adopted countries and almost all Sri Lankan scientists who were employed initially having left for universities, in Sri Lanka and abroad. The most notable achievement of SLINTEC during this period was the development of a urea-based nanofertiliser, which when applied to the soil had the capability to release nitrogen slowly, thus facilitating its uptake by plant roots with minimum losses due to leaching. However, the US patent of this product, which was developed with a significant contribution of public funds of the Sri Lankan government was sold to a foreign company in a transaction, the details, and conditions of which are still not transparent to the general public. Ironically, after having spent so much on developing a nanofertiliser of its own, Sri Lanka had to spend another huge sum of public money to purchase a liquid nanofertiliser during the ill-fated 100% organic agriculture drive. Like the 100% organic agriculture project, the imported liquid nanofertilizer turned out to be largely ineffective.

The lesson that can be learnt (for those who are willing to learn) from Sri Lanka’s experience to adopt and promote nanotechnology is that successful and widespread adoption of a new technology is not possible without first establishing a broad base of R & D expertise and infrastructure in an adequately wide range of disciplines and applications. Establishing a centralised institute, however well-equipped, will not be sustainable in the long run and will not make a significant impact on national development. The adoption of biotechnology in Sri Lanka, which emerged as a discipline of high promise to Sri Lanka in the 1990s, is marginally better though nowhere near the level required to boost the national economy. When the present Minister of Education was holding the portfolio for Technology and Research under a previous administration, there was a proposal by a few academics close to him to establish a well-equipped Centre for biotechnology along the same lines as SLINTEC. The present author, as a member of the National Science and Technology Commission (NASTEC) at the time, advocated establishment of several biotechnology research groups in key areas of its applications and supporting them through equipment and other resources rather than spending on establishing one big Centre. This advice fell on deaf ears and the proposal went ahead but stalled when the Minister left his portfolio. This is illustrative of many initiatives in Sri Lanka, especially related to Science and Technology, which come from the top (i.e. the politicians). These proposals often come with a ‘sell-by-date’, which is either the next election or the period of the politician in charge of the specific Ministry. It is important to take into account all these historical facts and learn lessons from them when embarking on this new initiative to promote, develop and adopt AI.

Concluding remarks

There is no doubt that AI has the potential to bring about significant positive impacts in several key sectors of the Sri Lankan economy and many facets of the day-to-day life of the Sri Lankans. However, it is important to understand that realization of that enormous potential of AI, which is already happening in the developed world4,7, requires a substantial investment from within Sri Lanka to educate itself on the strengths and limitations of AI and develop, as much as possible, AI tools of its own or adopt those developed elsewhere only after rigorous validation within the Sri Lankan context. Adequate precautions are required to address the inherent limitations of AI, formulate and implement safeguards against the risks and illusions posed by AI and to guard against total reliance on AI once it gains the trust of its users1,5. In particular, measures are needed to prevent the loss of creativity in future generations of Sri Lankans, especially the students and other learner groups, who are highly likely to be hooked on AI tools in their learning process.

Additional Reading

1. Why scientists trust AI too much – and what to do about it. (Editorial). Nature, 627: 243. 14 March 2024. https://doi.org/10.1038/s41586-023-06221-2.

2. Alvarado, R. (2023). What kind of trust does AI deserve, if any?. AI and Ethics, 3(4): 1169-1183. https://doi.org/10.1007/s43681-022-00224-x.

3. Carroll, J. M. (2022). Why should humans trust AI?. Interactions, 29(4), 73-77. https://doi.org/10.1145/3538392.

4. Krenn, M. et al. (2022). On scientific understanding with artificial intelligence. Nature Reviews Physics, 4(12): 761-769. https://doi.org/10.1038/s42254-022-00518-3.

5. Messeri, L. & Crockett, M.J. (2024). Artificial intelligence and illusions of understanding in scientific research. Nature, 627: 49-58. https://doi.org/10.1038/s41586-024-07146-0.

6. von Eschenbach, W.J. (2021). Transparency and the Black Box problem: Why we do not trust AI. Philosophy & Technology, 34: 1607–1622. https://doi.org/10.1007/s13347-021-00477-0.

7. Wang, H. et al. (2023). Scientific discovery in the age of artificial intelligence. Nature, 620: 47-60. https://doi.org/10.1038/s41586-023-06221-2.

The writer is a Fellow of the National Academy of Sciences of Sri Lanka and has been an academic and a research scientist in Agriculture and Natural Sciences for over three decades while being based in Sri Lanka.

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Promote purple sweet potato

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By Prof. Kirthi Tennakone

The sweet potato is probably the oldest cultivated crop. Native to tropical America, Peruvians grew it 8,000 years ago. Colombus introduced sweet potatoes to Europe; later the Spanish and Portuguese dispersed the species in Asia and Africa. Today, sweet potato is one of the staple foods that alleviate starvation and malnutrition in many parts of the globe.

In the tropics, sweet potatoes produce more food per hectare than any other cultivation. Being drought – resistant and requiring minimal irrigation, fertilizer and pesticide inputs, the crop would be a promise for the world confronted by climate change.

There are highly nutritious varieties of sweet potatoes, of which sweet potato with bright purple flesh; rich in disease-fighting agents, vitamins, minerals and fiber is emerging as a superfood – chosen as the vegetable of the year 2024 by Veganuary (the organization that promotes vegetarianism by abstaining from eating animal-based food in the month of January, every year)

The sweet potato stands out as the first genetically modified vegetable people have unknowingly consumed for millennia. The modification was done not by humans, but by a bacterium found in soil. The ancestor of sweet potatoes was a creeper belonging to the Morning Glory family (Convalesce). Thousands of years ago microbe named Agrobacterium transferred a portion of its DNA (a gene) into the genome of a plant of the original kind in Ecuador, favourably altering its characteristics. In the modified plant, roots were enlarged to yield giant tubers, storing starch, proteins, minerals, water and a host of other beneficial substances. Naturally, the genetically engineered variety withstood harsh conditions and survived better. Noting the exceptional food value, South American farmers domesticated the transgenic species. The rise of Mayan and Aztec civilizations owes much to the sweet potato. Transgenic crops can do wonders!

Today, thousands of cultivars of sweet potato exist, generally described by the colour of the skin and flesh of the yam. The skin colours of white, brown, pink, yellow and purple are common, and the flesh colours vary from white, yellow and orange to purple. These colours originate from two types of pigments known as carotenes and anthocyanins.

Apart from chlorophyll, which imparts green colour to leaves, plants carry two other pigment types: carotenes yellowish orange in colour and anthocyanins displaying hues ranging from red to blue. As we all know, in leaves chlorophyll harvests sunlight and utilizes trapped energy to fix carbon dioxide synthesizing carbohydrates. Carotene and anthocyanins, present in leaves and other plant tissue play an important role in photosynthesis and other plant biochemical processes and give conspicuous colours to flowers, fruits and yams.

Nowadays, people are told to eat coloured vegetables and fruits, because carotenes and anthocyanins have numerous health benefits, including the prevention of cancer, heart disease, diabetes and dementia. What is the secret of coloured produce? A condition that greatly contributes to the above complications is oxidative stress, a side effect of the indispensable oxygen we continuously breathe. Oxygen burns carbohydrates and fat in our bodies, liberating energy and releasing water and carbon dioxide. However, this chemical reaction creates highly reactive molecular species, known as free radicals. Free radicals damage DNA and attack cellular tissue, causing disease and aging. Fortunately, there are agents called antioxidants that scavenge free radicals before they do any harm. Carotenes and anthocyanins act as superb antioxidants.

Current research reveals anthocyanins, the red and blue pigments in vegetables and fruits have a myriad of health benefits because they are water soluble and transmissible throughout the body after absorption from the gut. They effectively quench free radicals, reducing DNA and cellular damage – a primary cause of cancer and inflammatory diseases. Anthocyanins cross the blood-brain barrier and possess a protective action against neurodegenerative cognitive impairments such as Parkinsonism and Alzheimer’s disease. With the increase in human longevity, these illnesses pose a major health issue for which no curative treatments are available. Recent investigations provide evidence for the beneficial effect of consuming anthocyanins rich vegetables in reducing the risk of developing these debilitating conditions.

The brilliantly coloured purple sweet potatoes are gaining recognition as a superfood because of the exceptionally high anthocyanin content, and the remarkable stability of the pigment and its resistance to cooking. The Spanish seemed to have collected this special variety of sweet potatoes from the Aztecs in Peru and planted it in the Philippines around the 1400s and from there, it spread to China and Japan. The climate on the island of Okinawa was ideal for sweet potatoes, a staple food for the islanders, who preferred the purple variety. Okinawans obtain more than 50% of their calorie requirements from sweet potatoes. The incidence of cancer, heart disease and dementia stand remarkably low in this land and people live relatively long compared to other regions of the world. Are purple sweet potatoes the secret of Okinawan longevity and healthiness?

Of course, other factors such as lifestyle and assortments in the diet would contribute to the good health and longevity of the people of Okinawa. As more and more studies confirm the consumption of purple sweet potatoes is indeed an important cause, the world is rushing to cultivate this crop and promote its consumption.

Purple-fleshed sweet potatoes are rare in Sri Lanka. The farmers and consumers are largely unaware of its value.

The author was fascinatingly attracted to purple sweet potato, because of his interest in anthocyanin pigments, which he used to demonstrate a novel solar cell concept for the first time now pursued worldwide. He successfully grew this plant in his home garden, Hantana, Kandy, and obtained a good yield; some tubers weighed more than a kilo. Purple sweet prefers colder night temperatures. Our Central Highlands are probably best suited to cultivating this crop. He wishes Sri Lankans will cultivate this crop and promote its consumption.

(The author is a theoretical physicist, formerly working at the Institute of Fundamental Studies, Sri Lanka. He can be reached via email: ktenna@yahoo.co.uk)

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