Karl Marx and Friedrich Engels lived during a time of great social and economic transformations in Europe, including the rise of industrial capitalism. Marx was forced to leave Germany and later France due to his revolutionary political activities and writings. He collaborated closely with Engels, who provided financial support and had first-hand experience with the conditions of the working class in Manchester. Marx analyzed societies as progressing through modes of production, from feudalism to capitalism, and believed capitalism contained internal contradictions that would lead to its downfall and replacement with communism. He criticized other thinkers like Adam Smith for not recognizing the exploitative aspects of capitalism and its negative impacts on workers. Marx's theory of historical materialism held that economic factors, not ideas