In this book, seven great modern thinkers trace the roots of their contributions to philosophy. Essays include A. J. Ayer on what led to his logical positivist manifesto Language, Truth, and Logic, and Martin Buber on the origins of his view of existence. Other contributors include Bertrand Russell, Albert Einstein, and Jean-Paul Sartre. | Genius in Their Own Words by David Ramsay Steele, Paperback | Indigo Chapters