This book studiously avoids the plethora of conjectural theories and poorly substantiated opinionation on which so much psychological and sociological research currently depends.  Instead, it reverts to the bedrock evidence of human history, and prehistory as mirrored in primatology, as its primary sources to construct a succinct and very user friendly text which teenagers, parents and aspiring global citizens can readily understand.  A more astute and widely assimilated knowledge of behavioural scientific principles is key to their resolution.