India, Oct. 24 -- Spite covers psychology, economics, genetics, literature and current affairs to examine why humans inflict self-harm just to get one over on someone else. Why do we secretly want our friends to fail? There are lots of irresistible stories about toxic behaviour in supermarkets and over the privet hedge, ramping up to incendiary divorces, backbiting politics, Trump, and Brexit. There's a hopeful message too - the upside of our dark side. Spite can drive us forward, and the author provides a fresh perspective on the word by showing the evolutionary benefits of spite as a social leveller, an enabler of defiance, a wellspring of freedom and a vital weapon in our everyday armoury....