Gunnar Heinsohn (21 November 1943 – 16 February 2023) was a German author, sociologist and economist and professor emeritus at the University of Bremen where he had a chair in social pedagogy from 1984. Heinsohn published on a wide array of topics, starting from economics, demography and its relationship with security policy and genocide, and revisionist chronology theories in the tradition of Immanuel Velikovsky. Source: Wikipedia (en)