Wilfred Trotter:
Wilfred Batten Lewis Trotter, who lived from 3 November 1872 to 25 November 1939, was an English surgeon, a pioneer in neurosurgery. He was also known for his studies on social psychology, most notably for his concept of the herd instinct.
Bernhard J. Schmidt:
Science and social psychologist,
Textbook author,
lives in Germany