There are many ways to move through and think alongside Ethan Philbrick’s Group Works. At first glance, it’s a book of academic theory coming out of performance studies. Following a “desire for collectivity,” Philbrick takes the small-scale formation of “the group” as the locus of inquiry. He enters the text with a tentativeness toward groups, recognizing the ways that they are frequently viewed with healthy suspicion or uncritical celebration. He asks: What kind of good-bad thing is a group to do? When do we do things in groups, and why? How do we group, and how does that matter? Moving with these questions, the book turns to artists experimenting with novel group formations in dance, literature, film, and music in the 1960s and ’70s. Each chapter pairs a “group work”—Simone Forti’s 1961 performance Huddle, Samuel Delany’s 1979 memoir Heavenly Breakfast: An Essay on the Winter of Love, Lizzie Borden’s 1976 film Regrouping, and Julius Eastman’s 1979 musical piece Gay Guerrilla—with contemporary works that re-imagine, re-perform, or dialogue with these experiments. Taken together, each pairing amplifies and extends the book’s central impulses to consider how groups assemble and disassemble. Along the way, Philbrick introduces a chorus of thinkers—theorists of community, theorists of in-operative community, theorists …