Heinrich Bernhard Oppenheim (July 20, 1819 in Frankfurt – March 29, 1880 in Berlin) was a German publicist and philosopher concerned with the ideas of liberalism, free trade and international law.
Oppenheim was son of a Jewish family of bankers in Frankfurt and studied law in Göttingen, Heidelberg and Berlin.
But his inclinations to journalism soon won the upper hand, and, his living assured by his family, he gave up teaching.
He spoke at the agitated mass meeting at Unter den Zelten where the legislature's petition to the king regarding the wishes of the people was discussed.
When a schism broke out between Brentano's moderates and Gustav Struve's terrorists, Oppenheim worked for the latter, and was dismissed from the newspaper when they failed.
He denounced the democrats for the victories of the Reaction, but thought the latter were ultimately to blame because they turned to raw despotic power rather than continuing with their phony constitutionalism.
[1] In 1861 Oppenheim joined the German Progress Party and edited the Yearbook for Politics and Literature which was banned soon afterwards.