Sir Wilfred Edward Le Gros Clark

… (1903–97) and the British primatologist Wilfred E. Le Gros Clark (1895–1971) developed theories of the mind as a nonmaterial entity. Similarly, Eccles and the Austrian-born British philosopher Karl Popper (1902–94) advocated a species of mind-matter dualism, though their tripartite division of reality into matter, mind, and ideas is perhaps more…