Mary Midgley 
Beast and Man [PDF ebook] 
The Roots of Human Nature

Philosophers have traditionally concentrated on the qualities that make human beings different from other species. In Beast and Man Mary Midgley, one of our foremost intellectuals, stresses continuities. What makes people tick? Largely, she asserts, the same things as animals. She tells us humans are rather more like other animals than we previously allowed ourselves to believe, and reminds us just how primitive we are in comparison to the sophistication of many animals. A veritable classic for our age, Beast and Man has helped change the way we think about ourselves and the world in which we live.