Class struggle refers to the conflict between different social classes, primarily between the bourgeoisie (the wealthy class that owns the means of production) and the proletariat (the working class that sells its labor). This struggle arises from the differing interests and economic conditions of these classes, often leading to social and political tensions. Historically, class struggle has been a driving force behind significant changes in society, including revolutions and reforms. It highlights the inequalities in wealth and power, prompting movements aimed at achieving greater social justice and economic equality, such as socialism and labor rights initiatives.