Sunday 27 December 2020

Lifespan: Why we Age – and Why We Don’t Have To by David A. Sinclair – Book Review

 


Publisher’s write-up:

‘In this paradigm-shifting book from acclaimed Harvard Medical School doctor and one of TIME magazine’s 100 most influential people on earth, Dr. David Sinclair reveals that everything we think we know about ageing is wrong, and shares the surprising, scientifically-proven methods that can help readers live younger, longer.

For decades, the medical community has looked to a variety of reasons for why we age, and the consensus is that no one dies of old age; they die of age-related diseases. That's because ageing is not a disease – it is inevitable.

But what if everything you think you know about ageing is wrong?

What if ageing is a disease? And that disease is curable.’

This is a book where the biologist for the Harvard Medical School, David A. Sinclair builds the case as to why ageing is not a natural phenomenon but a ‘disease’. The book is split into three parts, with a foreword from the author explaining the painful loss of his grandmother before moving on to the technical aspects of the subject.

The first part deals with what we know (the past) – and it is explanation of what is DNA, what are its components, and what are the damages it incurs during the course of our existence (and could it be fixed?). This was the most technical part of the book and while I understood the crux of it, I do not have the technical competence to fully understand all of it – if you have a background in the subject, you may read those paragraphs in detail. However, I appreciate the author for placing his best efforts to simplify – it was interesting how he wrote single paragraph science fictions during the book to simplify what was ageing and why it was a disease.

The next part is about the present and the research that is ongoing and in particular, his research. He discusses some simple lifestyle changes that could be incorporated to live longer – such as fasting. Many of it was a repetition of his assertion that ageing is a disease, that nobody dies peacefully and that every death is very painful. I found it interesting when he mentioned that the term ‘died of old age’ is used so often in common parlance though that is no medical term – and people die because of failure of some organ, which means all it needs to be done to live longer is to address these problems.

The final part is the author discussing the future – 80 is the current normal for a human being at present. Though immortality is not the author’s immediate proposition, he does assert that for millennials and the generations that follow, living up to 120 may not be rare and explains why this is scientifically possible – that there is no natural age limit for the human body. Much as the author is convinced of the premise, he does not ignore the economic and social problems that this change could bring – should people spend a longer part of their life studying? Should people have to prepare for a second career at the age of 60? What about the impact it would create on societal progress? It was never a case in history that a majority of people who were blocking progress – such as those opposed to women’s rights in the 19th century, opposed to civil rights in the 20th century, etc. suddenly changed their opinion after passing of a law, but that they were eventually replaced by the subsequent generations who did not hold their views.  

I appreciated two aspects in this work of the author – despite the subject being highly technical, the author tried his best to simplify for the sake of the readers. At this point I need to mention that there is a co-author, the journalist Matthew D. LaPlante and a lot of the efforts at simplification could have been his inputs. This was unlike the book that I read from Edward O Wilson on Diversity of Life (who was incidentally quoted in this book) – which felt like reading a textbook. The author unlike a lot of scientists, was highly appreciative of his team and till date, I have not read a longer list of names in the acknowledgements section of a book.

This book made me think – about what the increased lifespan could cause – especially what the author presents – one where you not only live longer but also healthier. Considering the progress that we have made in this field over the years, I certainly believe that the author’s prognosis is possible, but it is not a reality that I look forward to. That was another point addressed by the writer that he is an optimist when it comes to the capability of humans whereas his children are a lot more pessimistic about the future, and he does acknowledge that there are a lot of problems which do not have a clear solution at present (e.g., climate change).

There are times I felt that the author was convinced of his own research that he was not willing to consider any cons to his premise. I would have liked it if this book had discussed the scientific reasons on why there could be a problem with the premise. I understand after reading his bio on the internet that his anti-ageing position is controversial among the scientific community. One could also argue about the ethical issues about the nature of some of his experiments – I do not have a clear position on whether scientific progress must be chased at all costs and thus, I was not pricked while reading any of it, but I can imagine why some people might feel uneasy. I did find it rather odd that he analysed the DNA of his daughters to find out that they had a particular gene and if they did not make bad lifestyle choices, they could live till 100 without a problem. However, if one of them did not, how would he have felt with the knowledge that one of them was going to die earlier than the other and not to mention, till the final chapter, I did not know that he has a son, whom he never mentioned – so did he not conduct this analysis or did he not have the particular gene type? I would stop my speculation on this here.

To conclude, I would say that this is a great book providing a new perspective, on a topic that we perhaps do not think much about and the best part is, you do not have to be an expert in the subject to understand the essence of them book (there are sections you might have to skim through). Considering the observations above, I would award the book a rating of eight on ten.

Rating – 8/10

Have a nice day,
Andy

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