Meyer Schapiro was a Lithuanian-born American art historian known for developing new art historical methodologies that incorporated an interdisciplinary approach to the study of works of art. An expert on early Christian, Medieval, and Modern art, Schapiro explored art historical periods and movements with a keen eye towards the social, political, and the material construction of art works.

Allan Kaprow was an American performance artist, installation artist, painter, and assemblagist. He helped to develop the "Environment" and "Happening" in the late 1950s and 1960s, as well as their theory. His Happenings — some 200 of them — evolved over the years. Eventually Kaprow shifted his practice into what he called "Activities", intimately scaled pieces for one or several players, devoted to the study of normal human activity in a way congruent to ordinary life. Fluxus, performance art, and installation art were, in turn, influenced by his work.