Chapter-by-chapter summary of Proof of Stake by Vitalik Buterin. Format inspired by Nat Eliason.Chapter 1: Markets, Institutions, and Currencies—A New Method of Social IncentivizationA new form of incentivizationAll solutions for incentivizing people to spend their time productively have historically fallen under one of just two categories: markets and institutions. With the invention of bitcoin, there is now a third: currencies. In contrast to solutions built by markets and institutions, sol...