You must be very old, for one the murder rate is at the lowest point since 1900. I can agree that US political theater is getting more clownish but there were similar times throughout history (including brawls breaking out in the House over slavery. Slavery by the way was very much not humane treatment. Same for up to the 60s and beyond)

Western civilization has been built on exploitation not not cooperation, it's stil an open question if we can build a cooperative society, my guess is no.