The number of war deaths during World War II rose to a staggering 300 per 100,000 people per year, or 0.3% per year. These are the rates Jared Diamond also recorded in dozens of hunter-gatherer tribes around the world. Analyzing the 20th century as a whole, the rates dropped to much lower values, with temporary peaks in the 1970s (0.007% per year) and the 1980s (0.005% per year), until settling at 0.3-0.5-1.0 per 100,000 people per year (0.0003-0.0005-0.001% per year) from 1991 onwards, after the end of the Cold War.
