"Sapiens" ought to be on every college (or even high school) curriculum. The subtitle, "A Brief History of Humankind," does NOT mean that it isn't very deep and very, very intense. Anyone interested in learning how the world works, and why it works the way it does, needs to read this. Giving it an honest read -- put aside all your cognitive biases about everything -- will open your eyes, and free your mind so that you can think critically. Since "Sapiens" is a book of actual "facts," some readers in this "post-truth" world might have a hard time swallowing it. Anyone finding this book difficult to read probably doesn't understand what "facts" and "evidence" are. These days, the line between facts and opinions very nearly doesn't exist. This book draws a hard and desperately needed line between the two.