In short, did fear and greed level change?
Yes, I would say that people have became less agressive overall and more friendly to eachother over the longterm.
Slavery was abolished, racism is diminishing, and humans have just a better social intereaction. Also couple that with social media and a reputation system, you can pretty much find the bad apples very fast.
People cannot become too greedy without a societal backlash
And what does it have to do with free market? Further, if greed and fear levels diminished, it should negatively affect free market, as I see it. Greed makes people strive for more, fear prevents them from losing what they already have...
I don't see your point, provided you have any