class struggle

class struggle (usually uncountable, plural class struggles)

1. Conflict between social or economic classes (especially between the capitalist and proletariat classes); the active expression of a theoretical class conflict looked at from any kind of socialist perspective
   • Karl Marx, Capital:A Critique of Political Economy - Vol. I-Part I: The Process of Capitalist Production, Cosimo, Inc. Cosimo Classics (December 1, 2007), page 19:

     Thenceforth, the class-struggle, practically as well as theoretically, took on more and more outspoken and threatening forms.

• class war