If right through history you had to pick a point somewhere in between say the Stone Age where there was no technology at all, life was exceptionally tough and people didn't have any rights right up to now where we have every convenience known to man but we live so out of tune with nature and we're watching the planet burn in slow motion. Where do you think the sweet spot was? The point where we had enough to make our lives easier but we weren't producing so much that it was actively destroying our planet?
Feel free to take other factors like wars or disease into account too if you like, but you don't have to!
I don't have an answer, I just posted this because I was reading about the Ancient Maya and thought it seemed like quite a nice life until I heard they sacrificed children.