Just finished reading it (little hard to find copy) and once again Colin Wilson doesn't disappoint. I'm truly amazed at the amount of research the author put in. Recommended to readers who like true crime.
There are others who have said the same thing but Wilson's perspective makes all the difference.

I had read only one book by Colin Wilson ("The Outsider", of course) when I found a paperback in a used-book store. There followed a month of fairly intense reading, because "A Criminal History of Mankind" is fascinating from beginning to end, and many sections I read over again. Wilson divides the book into three main sections: 1) The Psychology of Human Violence 2) A Criminal Outline of History 3) The Age of Mass Murder. In the first section, Wilson notes that criminal actions have been motivated by the "hierarchy of needs":food, shelter, sex, and the need for admiration. (In recent years, we have seen those who commit murder in order to gain fame.) Wilson describes what he calls the "right man", a sociopath obsessed with image and self-esteem. Most of these people are life's losers, but not all. A startling exception is the successful comic actor Peter Sellers, whose son's biography shows Sellers to have been almost criminal in his manic, morbidly obsessive nature. The second section is, by Wilson's own admission, H.G. Wells' "Outline of History" from a criminal point of view, everything from ancient Athens to Victorian London. Interestingly, Wilson writes: "This book is centrally concerned with crime; but if we ignore the creativity, we shall not only fail to understand the crime: we shall miss the whole point of human history." The third section goes into our own era, the Bundys, the DeSalvos, the Mansons. Wilson spends a full 50 blood-drenched pages on the Mafia. The book, published in 1984, touches only briefly on the disturbing increase of children who kill. Along with the horrors, there are pages of incisive philosophy: "It is true that we cannot live without an ego; a person without an ego is little more than an idiot. Another name for ego is personality, and in artists, saints, and philosophers, the personality is a most valuable tool. Neither St Francis nor Beethoven nor Plato would have achieved much impact without their personalities. But the personality is a dangerous servant, for it has a perpetual hankering to become the master. Every time we are carried away by irritation or indignation, personality has mastered us."Violence will always be with us. A casual glance at yesterday's New York Times finds the coverage of a man who threw his baby from a 15-story window while bickering with his wife. But Wilson ends his riveting book with cautious optimism: Referring to the criminal as a distortion of humanity, he writes (and quotes the German poet Novalis) that when humanity itself is aware that this is only a nightmare, we are close to awakening.

if you have ever read anything by colin wilson (certainly youve read "the outsider") then definetly read this book. The things this book can teach us about society and humanity is unparalelled in a 'simple' true crime fashion. One of our centuries greatest philosophers has an intriguing view on many things, yet quite often you will find yourself agreeing with much of what he says about us all.