Martin Heidegger: the philosopher who fell for Hitler

Martin Heidegger is regarded by some as the greatest philosopher of the 20th century. He was also a Nazi recently exposed as an anti-Semite in his private Black Notebooks. Can his thought be saved from his politics, asks Michael Inwood?

Martin Heidegger in 1933, the year he began co-operating with the Nazis Photo: Corbis