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Tim Harford explains the numbers and statistics in the news and in life

Tim Harford explains the numbers and statistics in the news and in life.

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The doubling of life-expectancy

12/06/2021 GMT

BBC World Service - More or Less, The doubling of life-expectancy

The story of how data helped extend our lives

Author Steven Johnson explains how we doubled our life expectancy over the last century - with the help of data.

Steven Johnson, author of Extra Life, tells the fascinating history of life expectancy, and the extraordinary achievements of the last century, in which it has practically doubled.

It’s a story that has data at its heart, from the ground-breaking invention of the category itself in 17th century London to the pioneering social health surveys of W.E.B. Du Bois in 1890s Philadelphia. 

Tim Harford spoke to Steven about the numbers beneath possibly the most important number of all.


Produced by Nathan Gower.


(Author, sociologist, historian and civil rights activist W.E.B. Du Bois at home in Brooklyn Heights, New York, 1958. Credit: David Attie /Getty Images)

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