Max Horkheimer "Horkheimer's book, Eclipse of Reason deals with the concept of "reason" within the history of Western philosophy. Horkheimer defines true
reason as rationality. He details the difference between objective and subjective reason and states that we have moved from objective to
subjective. Objective reason deals with universal truths that dictate that an action is either right or wrong." [eng]
Horkheimer, Max. The Columbia Encyclopedia: Sixth Edition. 2000 German philosopher and sociologist. As director (1930–58) of the Institute for Social Research in Frankfurt, he played an important role in the development of critical theory and Western Marxism. [eng]