Great chart, and I've never seen it displayed that way. It really puts humanity's progress into perspective. Thanks for sharing.

I really like this. It did make me wonder how bad life really was for those in what the graph calls 'absolute poverty'

My initial response is 'quite bad' and, quoting Hobbes, that life was 'nasty, brutish and short'.

By then I thought about it a bit more and number of considerations occurred to me:

1. Most people adapt to most things that happen. There's evidence lottery winners and those who get disabled return to their pre-event level of life satisfaction after 6 months.

2. People make mistakes when imagining their future lives or the lives of others. There's also evidence we engage in a 'focusing illusion' and only consider the differences between our life and some other life, rather than the similarities or how it would be to actually live that life. For example, Bill Gates (probably) doesn't wake up every morning and shout "I'm the richest man in the world!" he gets up, has coffee, gets stuck in traffic, goes to meetings, etc..

3. Most people report being happy (or, more specifically, about 7/10 say they are satisfied with their lives). I'm critical of this sort of data, as well as the fact it's mostly from people outside of poverty, but it's still striking, at least to me, how pervasive this is.

4. The preceding three points make evolutionary sense: if we didn't want to be alive, we probably wouldn't try to be. It also follows changes, rather than objective conditions, are often most relevant (think about how you're sensitive to small noises when alone at night, but not in a night club). Natures fits creatures to receive pleasure from that which is essential to their survival. I now wonder if, actually, day to day, hour by hour, Agricola would probably have reasonably happy unless he were cold, hungry or unwell. I'm not saying I would chose his life over mine, only that it probably wasn't as bad I automatically thought it was.

What do others think?

I can provide references for anyone who wants to quibble with my empirical claims