Kazimierz Kelles-Krauz
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Kazimierz Kelles-Krauz born in 1872 in Szczebrzeszyn, Poland, died in 1905 was a Polish philosopher and sociologist, member of the Polish Socialist Party. He was one of the most significant Marxist thinkers at the end of the 19th century.
His greatest contribution to sociology is the "law of retrospective revolution" according to which "the ideals with which each reform movement tries to replace existing social norms are always similar to the norms of a more or less distant past".