Johannes Sløk (April 27, 1916 – June 30, 2001) was a Danishphilosopher, professor at the University of Aarhus and founder of "Idéhistorie" (History of Ideas), an interdisciplinary discipline mainly about writings pertaining to the ideas of Western culture since Antiquity. The concept is now the "Institute of Philosophy and History of Ideas" a department under the faculty of humanities of Aarhus university. During the student rising of 1968, Sløk was forced to leave his position as professor at Idéhistorie, and the institute became oriented around Marxist theory. Sløk instead was granted a special position at the Department of Theology, as professor of analytic theology. Sløk was one of the four Aarhus theologians and wrote a series of books on religion and its meaning to the modern man.