Title: Leo Strauss on Barrett's "Irrational Man" : "The best English introduction to the subject [of Existentialism]"
Review: Leo Strauss, in 1958, said that William Barrett's "Irrational Man" "is...the best English introduction to the subject [of Existentialism]." Existentialism is one form of radical historicism (or historical relativism) that came before its most recent manifestation, postmodernism. The cardinal thinker of radical historicism (or historical relativism) in both forms is the Nazi Martin Heidegger (1889-1976) whose masterwork is Being and Time (e.g. the Introduction and Section 44c).
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