Karl Heinrich Marx was born on May 5, 1818 in the city of Trier, Germany. Marx was a revolutionary who advocated "merciless criticism of everything existing" and was the co-originator of the theories of "Communism."

In the autumn of 1843, Marx went to Paris in order to publish a radical journal. It was in Paris in September, 1844 where he first met life-long friend and associate Frederick Engels. Marx and Engels were both active in various revolutionary groups and together worked out the theory and tactics of "Revolutionary Proletarian Socialism" or "Communism."

Marx was banished from Paris in 1845 as a dangerous revolutionary. He went to Brussels, Belgium. In the spring of 1847 Marx, along with Engels, joined a secret society called the "Communist League." At the league's request they authored the " Communist Manifesto," which outlines the theory of the class struggle, and of the revolutionary role of the proletariat. Due to his revolutionary activities, Marx was banished from Belgium in February 1848, finally ending up in London in 1849 where he lived until his death.

In 1864 the "International Working Men's Association" was founded in London. Marx was a central figure in the new organization, and author of its first statement, and a host of resolutions, declarations and manifestos. His health was undermined by his strenuous work for "International." The first volume of "Das Kapital," Marx's most important work, appeared in 1867. Ultimately ill-health prevented him from completing two other volumes.

On March 14 1883 Marx passed away peacefully in his armchair. He lies buried at Highgate Cemetery in London.