Identity and Difference consists of English translations and the original German versions of two little-known lectures given in 1957 by Martin Heidegger, "The Principle of Identity" and "The Onto-theo-logical Constitution of Metaphysics." Both lectures discuss the difficult problem of the nature of identity in the history of metaphysics. 

 

This translation marks a significant improvement over earlier versions in English. In addition to her clear, accurate translation, Joan Stambaugh, who was a student of Heidegger’s, offers a helpful introduction and a list of references.