For centuries, humankind has tried to answer some of life's more esoteric questions: How did the universe begin? What is my purpose in life? Why are we even here? While we may never have the perfect answers to these questions, the learned men and women featured in this set have struggled to do exactly that, and in the meantime have made great discoveries about people, our lives, and the universe itself. From ancient thinkers such as Pythagoras and Confucius to modern intellectuals such as Jacques Derrida and Peter Singer, this set will take readers on an amazing journey of human thought and introspection.