Ernst Mach
In the 1880s, increased attention was given to the idea that it was necessary to push aside previous norms entirely, instead of merely revising past knowledge in light of contemporary techniques. The theories of Sigmund Freud (1856–1939), and Ernst Mach (1838–1916) influenced early Modernist literature. Ernst Mach argued that the mind had a fundamental structure, and that subjective experience was based on the interplay of parts of the mind in "The Science of Mechanics" (1883). Freud's first major work was "Studies on Hysteria" (with Josef Breuer) (1895). According to Freud, all subjective reality was based on the play of basic drives and instincts, through which the outside world was perceived. As a philosopher of science, Ernst Mach was a major influence on logical positivism, and through his criticism of Isaac Newton, a forerunner of Albert Einstein's theory of relativity.