The history of mankind since 13,000 BCE. Why have certain peoples gained such a big advantage over others to be able to conquer and rule them? Because of geographic advantages. Better domesticable crops, better domesticable animals, led to food surpluses that made it possible to have specialists who can innovate and improve technology for a society, tribe, chiefdom, eventually state. Interesting to read, full with Fun Facts and little take-aways, but about 20% of it is redundant or repetitive. Also worth mentioning, this book is highly controversial as many of Diamond’s “facts” stem from observations he has made personally and are therefore not representative of whole societies’ behaviors over centuries or longer timespans.