Modern cultural alienation is reinforced by pornography, the pentagon of misogyny
Capitalism distorts our understanding of social relations. Class structured societies, by their very nature, deform these relations. Marx developed and looked at the theme of alienation, from the Economic and Philosophical Manuscripts in 1844 to Capital in 1867.
Marx said that commodity production captures human labour within capitalist production. The relationships between people get caught up in the relationship between things.