If we think in percentage terms, i.e., a world of 100 people, then we can see that in 1820, 94 of us would have been living in extreme poverty, compared to 10 of today. That is a decline even in absolute terms--from about 940 million in 1820 to 740 million today. Literacy and basic education have improved all over the world, vaccinations are up and child mortality is down. And, in step with the recent blog post by Ben Wilson at LSE about demography and democracy which I noted a few days ago, the percent of the world's population living in a democracy has grown from 1 to 56.
The strength of these numbers is to remind us to be optimistic about the prospect for the continued improvement of human society. The danger, of course, is complacency that might come from thinking that everything is going to automatically be OK. There is nothing automatic about any of this, as Roser notes. It requires massive collaboration.
There are big problems that remain. None of the above should give us reason to become complacent. On the contrary, it shows us that a lot of work still needs to be done – accomplishing the fastest reduction of poverty is a tremendous achievement, but the fact that 1 out of 10 lives in extreme poverty today is unacceptable. We also must not accept the restrictions of our liberty that remain and that are put in place. And it is also clear that humanity’s impact on the environment is at a level that is not sustainable and is endangering the biosphere and climate on which we depend. We urgently need to reduce our impact.But then if you've read my book, you already know this...