1. Liberals disagree with social classes there is no point for it. It’s just another form of identity politics.  Socialists think that class is more than another identity you learn about racial and  gender. 

2.”First, class structures are built around a close form of dependency. Second, the basis of capitalist class power — their control over society’s productive assets — forces all of society into dependence on them.”

3.“First, the fact that everyone else in society exists in a state of dependence on capitalists means that other forms of oppression are intimately bound up with class power — and so confronting them inevitably requires confronting the power of the capitalist class. Second, and relatedly, the socialist view of class tells us something crucial about where the kind of power that is capable of undoing various forms of oppression is located.”