Abstract
This essay is a study of Polanyi’s career as scientist and philosopher from the point of view of the history of science, starting with the first step in his academic career helped by an intervention of Albert Einstein. Polanyi’s ideas are better understood if placed against the background of then-fashionable philosophical movements, including logical positivism, and his disagreement with Bukharin in 1935. The essay studies the sources and ambitions of Polanyi’s notion of the tacit dimension, his attitude to evolution and “emergence,” and his contribution to the search for the origins of Einstein’s Relativity Theory. His success in the last of these is shown to be an exemplar of Polanyi’s own philosophy.