The authors have given the life stories, their achievements and their thought process of twenty famous Western philosophers. From Socrates to Santayana, the biographies are given in simple and vivid manner.Each biography is like an adventure story dotted with famous deeds. They inspire and enthrall, they capture our imagination and set fire to it. And they succeed. The thread that runs through the entire gamut of these twenty odd philosophers thoughts and deeds is that unanimity on the fundamental purpoe of human life which is, happiness through the cooperation of mankind. Plato and Socrates, Aristotle, Francis Bacon, Descartes, Voltaire, Kant, Hegel, Spencer, William James, Bergaon, Santayana are some of the philosophers in this book whose life stories are given.