Friedrich Engels
Marx's partner, who observed the harsh conditions of factory work in England during the mid-19th century, contributing to their critique of capitalism.
Videos Mentioning Friedrich Engels

Douglas Murray: Racism, Marxism, and the War on the West | Lex Fridman Podcast #296
Lex Fridman
Karl Marx's collaborator, mentioned as the recipient of Marx's letters containing abhorrent racial views.

The Debate between Karl Marx and John Locke on Natural Rights (Lessons from Hoover Boot Camp) | Ch 2
PolicyEd
Marx's partner, who observed the harsh conditions of factory work in England during the mid-19th century, contributing to their critique of capitalism.

Michael Malice: Christmas Special | Lex Fridman Podcast #347
Lex Fridman
Collaborator with Marx, who shared the vision of the state withering away after man's nature was remade.

Magatte Wade: Africa, Capitalism, Communism, and the Future of Humanity | Lex Fridman Podcast #311
Lex Fridman
Co-author of the Communist Manifesto, whose ideas are criticized for promoting violent revolution and economic nonsense.

Arthur Brooks on Reinvention, Religion, and the Science of Happiness | Conversations with Tyler
Conversations with Tyler
Associated with Karl Marx, likely referenced implicitly in the 'Marxist mayor' comment about Barcelona.