Massively increase human life expectancy
We don’t even think about it, but isn’t it amazing that we can broadly expect to live into our 80s? Just a few centuries ago human life expectancy was around 30 years old – but thanks to advances in medicine and public health, we’re no longer dying of cholera when we drink water – and if we get injured, we in most cases just get patched up again. Perhaps one of the most significant things that humanity has managed to do is reduce child mortality significantly – which is one of the main drivers of what made the previous average so low.
Whilst there are still big differences around the world – with Subsaharan Africa not enjoying the same increase in average life expectancy, you have to admit this is a pretty astonishing achievement.