The Origins of Sigmund Freud's Theories

Sigmund Freud's theories of psychoanalysis were growing more and more popular in the western world. The political doctrine of Marxism was on the rise in the first half of the 20th century. Add to this the debate over how to interpret the radically counterintuitive theory of quantum mechanics, and people began turning to philosophy for answers. Then comes the Viennese philosopher Karl Popper, who answered all of these questions with his epistemological theory, his theory of knowledge called critical rationalism.