The title of this talk alludes to process-based works of the late 1960s by sculptor Robert Morris and choreographer Yvonne Rainer. They were among a wave of artists in different disciplines who explored alternatives to stable, unified, and repeatable artworks and performances. Piekut intends to survey this shared impulse and its relationship with improvisational modes of creative practice, and to develop the notion of a “fetter of improvisation” that emerges in these years, seemingly to compensate for the loss of repeatable works. In addition to the uncertainties of ever-changing artworks, he will show, artists of the late 1960s faced novel problematics of shared authorship.