While it's appealing to believe Pinker, his treatment of statistics and probability of war has been debunked. For a mathematical analysis of the history of war

While it's appealing to believe Pinker, his treatment of statistics and probability of war has been debunked. For a mathematical analysis of the history of war see Cirillo and Taleb's paper "On the statistical properties and tail risk of violent conflict" (https://www.fooledbyrandomness.com/violence.pdf https://www.fooledbyrandomness.com/violence.pdf). From the paper: "Accordingly, the public intellectual arena has witnessed active debates, such as the one between Steven Pinker on one side, and John Gray on the other concerning the hypothesis that the long peace was a statistically established phenomenon or a mere statistical sampling error that is characteristic of heavy-tailed processes, 16] and [27]–the latter of which is corroborated by this paper."