Continental philosophy is a set of 19th- and 20th-century philosophical traditions from mainland Europe. This sense of the term originated among English-speaking philosophers in the second half of the 20th century, who used it to refer to a range of thinkers and traditions outside the analytic movement. Continental philosophy includes the following movements: German idealism, phenomenology, existentialism (and its antecedents, such as the thought of Kierkegaard and Nietzsche), hermeneutics, structuralism, post-structuralism, French feminism, psychoanalytic theory, and the critical theory of the Frankfurt School and related branches of Western Marxism.