Stefan Klein is a physicist, author and essayist who has specialized in writing on science and its social implications. He is best known for his books "The Science of Happiness" and "Time: A User's Guide". His works have been translated into 25 languages and became best sellers in many countries. In his latest book "Survival of the Nicest" ("Der Sinn des Gebens": 2010, forthcoming in English) he explores the neural and evolutionary underpinnings of human cooperation, arguing that a connected word leads to an advancement of moral norms.
For Bio see: http://en.wikipedia.org/wiki/Stefan_Klein