According to Marxist Conflict Theory, what is the primary driver of social change and historical development?

According to Marxist Conflict Theory, the primary driver of social change and historical development is the struggle between different social classes. This theory suggests that society is divided mainly into two groups: the bourgeoisie, who own the means of production, and the proletariat, who sell their labor. As these classes interact, conflicts arise due to their opposing interests, leading to changes in society. For example, during the Industrial Revolution, workers demanded better wages and conditions, which sparked movements and eventually led to reforms. This ongoing conflict between classes is seen as the engine that propels society forward and shapes its history.