It was a tough book to turn off. Harari uses a very post modern to pragmatist philosophical grounding. Traditional history readers and classic liberals will have to work through new concepts of truth to keep up. His book made me think of history in new ways. Harari's book is a partial rebuke to Pinker's Better Angel's of our Nature. I should read them back to back to get both sides of the argument. Harari is to Rousseau as Pinker is to Hobbes.