Karl Heinrich Marx (5 May 1818 – 14 March 1883) was a German philosopher, economist, sociologist, historian, journalist, and revolutionary socialist. Marx's work in economics laid the basis for the current understanding of labor and its relation to capital. He published numerous books during his lifetime, the most notable being The Communist Manifesto (1848) and Das Kapital (1867–1894).

When Stan discovers that Steve has been used in a plot by Sergei Kruglov to turn an American boy into a communist as revenge for the fall of the Soviet Union in "Red October Sky", he finds that Steve's room has been redecorated with communist icons, including pictures, a bust and matryoshka dolls of Marx.

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