The book has a very large scope, all creatures for all time snowball earth, evolution of life forms, extinction events and through tribal man, civilized man, and modern man. The book is not about solutions, but about choices. More than history, it covers why things happened, what it meant at the time and what it might mean in the future. It is a fun book looking at some events in a new way. i.e.. The success of capitalism and free markets has resulted, as it must, in inequalities...which go against the man's millions of years of Trible living and preference for equal outcomes.