The Grand Union was a leaderless improvisation group in SoHo in the 1970s that included people who became some of the biggest names in postmodern dance: Yvonne Rainer, Trisha Brown, Steve Paxton, Barbara Dilley, David Gordon, and Douglas Dunn. Together they unleashed a range of improvised forms from peaceful movement explorations to wildly imaginative collective fantasies. This book delves into the "collective genius" of Grand Union and explores their process of deep play. Drawing on hours of archival videotapes, Wendy Perron seeks to understand the ebb and flow of the performances. Includes 65 photographs.