Democracy's Body offers a lively, detailed account of the beginnings of the Judson Dance Theater--a popular center of dance experimentation in New York's Greenwich Village--and its place in the larger history of the avant-garde art scene of the 1960s. JDT started when Robert Dunn, a student of John Cage, offered a dance composition class in Merce Cunningham's studio. The performers--many of whom included some of the most prominent figures in...