Ellsberg stopped doing research years ago but someone, somewhere, is citing his classic work on “ambiguity aversion” every day.  He dropped out of research to become a policy guy and worked at the Pentagon during the Vietnam War.  Ellsberg became a dove as he discovered what was going on behind the scenes and leaked the Pentagon Papers.  The movie about him, “The Most Dangerous Man in America”, was nominated for an Oscar in the documentary category.  The camera picked him out at one point in the telecast. An interview with him can be found here (the Ellsberg segment starts 25 mins into video).