Konstantin Ramul

Konstantin Ramul (30 May 1879 – 11 February 1975) was an Estonian professor of psychology and longtime chair of psychology at the University of Tartu. He is best known for his work on the history of experimental psychology.
Ramul believed that history is dependent upon psychology, though the philosopher of science Ernest Nagel criticized him for "not stat[ing] clearly the type of psychological investigation which is relevant to the historian's task" (Nagel 1934, pp. 599–600).