That in the long term suffering decreases and well-being increases in modern liberal democracies.
Well I haven't disputed that things have improved. In fact, I have explicitly stated that they have. As for modern liberal democracies, many people would argue that modern liberal democracies are simply better than say totalitarian states or lawless states simply because they are modern liberal democracies. Myself included.
You will perhaps also have noticed that even in non-modern liberal democracies that life has got much better for people going by most statistical metrics such as literacy, longevity, infant mortality etc...
But I am not disputing that things have got better in those terms, so to call me ignorant is, I think, insulting. I also don't appreciate your moralizing tone about how I don't appreciate how good things are for me. It suggests you think I am ungrateful.
Google provides no help for "crooked headed ones". I was curious and skimmed my Don't Sleep There are Snakes but didn't find a reference. The Pirahã call themselves Hi'aiti'ihi, The Straight Ones. I'm not sure they call anyone "crooked headed ones" but I could be wrong. Do you have a link or page number?
In any event, there are in fact Pirahã that immigrate to modern societies.
Page 304 of
Language: The Cultural Tool
But the Pirahãs have begun to ask me each time I visit why they are so few (they say "so small") and why there are so many "crooked people" in the world (the Pirahãs view all non-Pirahã people as "crooked" that is bent and not working properly).
I have not read
Don't Sleep There Are Snakes, but apparently one of the chapter titles is "Crooked Heads and Straight Heads" (Chapter 16), so your skimming was presumably quite perfunctory.
But my point, in response to your question of "Where would you rather live?" was that simply asking a person if they would rather live in the time and place that they do now or some other time and place is not a good thought experiment as I believe most people are biased in favour of where and when they live. Most people. And some people, while they may choose to live elsewhere, might not do so just because some place is a modern liberal democracy with all the comforts that we enjoy today.
I think that Fukuyama also made this point, unintentionally at first, when explaining that, say, Denmark is an ideal country from a modern liberal democracy perspective and which is "objectively" (if we used statistical measurements of corruption and functioning legal systems etc...) better than Italy. And yet asked where would he prefer to live he says "Italy".
I bet there are many Americans who consider their country objectively better than most of the social democratic European countries and would never dream of living in such places. Many other people, even posters here, have moved country, but they have gone to countries which - from a modern liberal democratic perspective - are objectively worse than where they came from.
On the subject of the Pirahãs, Everett illustrates my point about people being biased in favour of where they live by saying:
When I am alone among the Pirahãs, or I am just with my own family with them, I become nearly bored to death at times. I do my research, eat my fish, walk around, talk a bit, and hit my hammock early. There is no one to discuss my culture with. No fancy restaurants. No wine. Just water, fish, manoic meal, popcorn, coffee, canned meat and a bit of exercise.
On my loneliest days I watch the Pirahãs fish, play tag, make arrows, nurse babies, tickle each other, and in all of their activities I wonder how they can tolerate the sheer monotony of doing the same thing over and over and over again, day in and day out, until they die.
By the same token, when they interrogate me about my life in the US, they find it stupefyingly uninteresting and wholly devoid of life. How can there be pleasure where people eat only bland food that someone else gets for them?
p.323