Originally published in 1961. Michael Polanyi was a polymath who influenced economics and the sciences as well as philosophy. His wide-ranging research in physical science is as well-known as his work on freedom and knowledge and his arguments against positivism and reductionism. This collection of essays written for him touches on all aspects of his influence but rotates around his published lectures The contributors address four areas – The Scientist as Knower, Historical Perspectives, The Knowledge of Society and the Knowledge of Living Things.