Henri Lefebvre was a French sociologist, Marxist intellectual, and philosopher, 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.

In his prolific career, Lefebvre wrote more than sixty books and three hundred articles. He founded or took part in the founding of several intellectual and academic journals such as Philosophies, La Revue Marxiste, Arguments, Socialisme et Barbarie, Espaces et Sociétés.

Lefebvre died in 1991. In his obituary, Radical Philosophy magazine honored his long and complex career and influence:
the most prolific of French Marxist intellectuals, died during the night of 28–29 June 1991, less than a fortnight after his ninetieth birthday. During his long career, his work has gone in and out of fashion several times, and has influenced the development not only of philosophy but also of sociology, geography, political science and literary criticism.