No photographer had a more serious and deeply felt response to the political and cultural impact of the 1960s and early 1970s than Richard Avedon, whose iconic portraits of key figures of the era influenced the course of photography in the decades that followed. In four monumental photographic murals (reproduced in large gatefolds) and many related portraits, he portrayed Andy Warhol's gender-bending Factory, with Viva and Candy Darling; Abbie Hoffman...