Michael Polanyi was an eminent physical chemist, economist, and philosopher. This book explains how the many diverse topics that concerned him belong together as essential elements in his effort to play physician to "the sickness of the modern mind." Using both published and unpublished writings, Prosch critically evaluates Polanyi's efforts and examines the value of his work as philosophy. The book contains a complete bibliography of Polanyi's humanistic publications and all of his earlier works.