Boris Parygin, Soviet philosopher, psychologist, and author (born 1930)

Boris Dmitrievitch Parygin was a Soviet and Russian philosopher, sociologist and one of the founders of social psychology and member of a wide range of international academies. Parygin was a specialist in a sphere of philosophical and psychological problems of social psychology – its history, methodology, theory and praxeology.

April 9 is the 99th day of the year in the Gregorian calendar; 266 days remain until the end of the year.