Ernst Marcus (philosopher)

Ernst Moses Marcus (3 September 3, 1856, Kamen – 30 October, 1928 Essen) was a German lawyer and philosopher.

He developed a theory of aether based on Immanuel Kant's posthumous work Opus Postumum, however sharply disagreeing with Erich Adickes interpretation.

He used this to mount a criticism of Albert Einstein's theory of relativity.

[3] In 1899 he started regular meetings with Salomo Friedlaender who admired his theses and became a firm supporter of him.

His papers are held by the Leo Baeck Institute, New York.