Dialectical Materialism:A Marxist theory that views the material world and its constant state of change as the fundamental basis of reality, with social and historical development driven by the clash of opposing forces.
The Communist Manifesto: A seminal 1848 political pamphlet co-authored by Engels and Marx, outlining their vision for a classless, communist society and the revolutionary overthrow of the bourgeoisie.
The Origin of the Family, Private Property and the State: A book written by Engels that analyzes the historical development of the family, private property, and the state, and their relationship to the oppression of women and the rise of class-based societies.