Karl Peter Heinzen was a revolutionary author who resided mainly in Germany and the United States. He was one of the German Forty-Eighters. He advocated terrorist violence against ruling dynasties and uninvolved civilian populations as a means to an end.
Karl Hess was an American speechwriter and author. He was also a political philosopher, editor, welder, motorcycle racer, tax resister, and libertarian activist. His career included stints on the Republican right and the New Left before embracing a mix of left-libertarianism and laissez-faire anarcho-capitalism. Later in life, he summed up his role in the economy by remarking "I am by occupation a free marketer ."
Karl Holl was a professor of theology and church history at Tübingen and Berlin and is considered one of the most influential church historians of his era.
