Ewald-Heinrich von Kleist-Schmenzin (10 July 1922 – 8 March 2013) was a German publisher and convenor of the Munich Conference on Security Policy until 1998. A member of the von Kleist family and an officer in the Wehrmacht during World War II, his parents were active in the German resistance against Adolf Hitler. Kleist was designated to kill Hitler in a suicide attack and was the last surviving member of the 20 July 1944 plot to assassinate Hitler.