How did the ideas of Karl Marx challenge the social order in Europe?

The ideas of Karl Marx significantly challenged the social order in Europe by promoting the concept of class struggle and advocating for the overthrow of capitalism. Marx argued that society is divided into classes, primarily the bourgeoisie (capitalist class) and the proletariat (working class), and that the interests of these classes are inherently in conflict. He believed that the exploitation of the proletariat by the bourgeoisie would ultimately lead to revolutionary change, resulting in the establishment of a classless society. This notion of class struggle made workers aware of their collective power and encouraged them to rise against the systemic inequalities perpetuated by capitalism, which Marx viewed as a source of social injustice and economic disparity. His ideas inspired various labor movements and revolutions throughout Europe, fundamentally questioning and seeking to alter the existing social and economic structures of the time.