In the history of twentieth-century ballet, no company has had so profound and far-reaching an influence as the Ballets Russes. It existed for only twenty years--from 1909 to 1929--but in that brief period it transformed ballet into a vital, modern art. The Ballets Russes created the first of this century's classics: Les Sylphides, Firebird, Petrouchka, L'Apr s-midi d'un Faune, Le Sacre du Printemps, Parade, Les Noces, Les Biches, Apollo, and Prodigal...