In the early period in London, Marx committed himself almost exclusively to his studies, such that his family endured extreme poverty. His main source of income was Engels, whose own source was his wealthy industrialist father.
Karl Marx/Wikimedia Commons, Tiny Fox Lab

Karl Marx and his family lived in extreme poverty from the time they moved to London up until his death. There were some days he could not even leave his house because his wife Jenny had to pawn his pants in order to buy food. – Tiny Fox Lab Facts

Preview photo credit: Karl Marx/Wikimedia Commons
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