Yuval Harari is well known for his books Sapiens and Homo Deus. He has decided to squander his reputation on a book called 21 Lessons for the 21st Century. The basic problem is that every chapter is the subject of whole shelves of books, and putting them all in one book cannot possibly do them justice. What we have left is a set of 21 editorials, which might inform the totally uninformed, but provide little insight and no solutions. As “lessons” they are unhelpful.