From how it all began to a compendium of formulae to make us happier in an improved world, touching on the keys to our emotions, the complexity of the brain and the secrets of the Earth, Eduard Punset gives us his clear, pleasing and accessible reflections on these gripping questions. He also widens his answers to fields of especial concern to all of us today, such as the economic crisis and the effect of politics on people's daily lives. Today, more than ever, there are no excuses for not thinking.