This seminar investigates experimental art practices that emerged in Brazil, Argentina and the United States over the course of the 1960s. Through focused, cross-cultural case studies, we explore how artists sought to use strategies of play, protest, reflexivity, and intervention to expand and even dissolve the category of art through spectator participation, bodily engagement, textual strategies, media interventions, and political activism. Close analysis of texts and works of art serve as a platform to debate such questions as: Was art extinguished in the shift from object-based practices to those of subjective and political liberation? Did experimentation lead to a new conception of art, and if so, how might we characterize it? What, finally, was left for art to do in societies in the midst of radical change?