My dad recommended this one to me. I don’t think I liked it as much as he did. Mr. Harari examines the cognitive history of humans, and basically argues that we have not become any happier due to all of our cognitive development. In fact, we may very well be more unhappy than ever. He is very concerned about the science of man creating his/her own happiness through chemistry and cloning. I did not see a whole lot of answers or solutions. Highly interesting? Yes. Helpful? not so much.