What is "chemical imbalance" even supposed to mean? Why don't hunter-gatherers need antidepressants? I swear, a psychiatrist could take a perfectly fine chimpanzee away from its jungle, confine it in captivity, and when the chimp gets depressed, they would say, "This chimpanzee has a chemical imbalance. What? A correlation between enculturation and depression? But culture brings us meaning and beauty. Get out of my way, cavemanwannabe. I need to prescribe this chimp some Xanax".