Henri Lefebvre (16 June 1901 – 29 June 1991) was a French Marxist philosopher and sociologist, best known for pioneering the critique of everyday life, for introducing the concepts of the right to the city and the production of social space, and for his work on dialectics, alienation, and criticism of Stalinism, existentialism, and structuralism. Lefebvre’s argument in The Production of Space is that space is a social product, or a complex social construction (based on values, and the social production of meanings) which affects spatial practices and perceptions. This argument implies the shift of the research perspective from space to processes of its production; the embrace of the multiplicity of spaces that are socially produced and made productive in social practices; and the focus on the contradictory, conflictual, and, ultimately, political character of the processes of production of space.