Simplify the following text for a Grade 15 native English-speaking person.
Original: Erich Pinchas Fromm ( March 23 , 1900 â `` March 18 , 1980 ) was an internationally renowned Jewish-German-American social psychologist , psychoanalyst , and humanistic philosopher .
Simplified: Erich Seligmann Fromm ( March 23 , 1900 -- March 18 , 1980 ) was a German-American Jewish social psychologist , psychoanalyst , humanistic philosopher , and Marxist .