[regularfry]

By what mechanism? I'd say that the historical record is specifically in support of this. Civilisations start out relatively equal, inequality increases over time as wealth concentrates in elites, then they collapse either to revolution or war, reset, and start again. What evidence do we have to support the idea that we should draw a line up and to the right?

[chakkop]

Maybe more correctly: the vast majority of humanity was equal in its wretchedness, poverty, ill-health, and violence; the vast majority of people led miserable, hungry, precarious, uninteresting lives.

Again, I'm not saying we've done all we can do. I'm not saying that many of the rich don't behave reprehensibly. I'm not saying we can't do better. But the question is: How? How can we do better most effectively? I don't think the answer is 'tax global wealth and redistribute' a la Piketty--because that's not what enriched us so over the past 200 years.

So yes, it has gone up and to the right, especially in most recent history--though, because of human folly, there is no guarantee that it will continue to do so.