Reddit mentions of A History of Cannibalism: From ancient cultures to survival stories and modern psychopaths

I remember reading a book recently that went over some of the different opinions certain cultures had on cannibalism, and the levels of cultural development of them. Turns out a lot of different cultures practiced it, ranging from tribes to full-blown empires, and in a lot of different forms. Not sure if it was 100% accurate, but I thought that this was a decent (if focused too much on serial killers) overview of cannibalism throughout history.