Through his operas, his symphonies, his compositions for his own ensemble, and his wide-ranging collaborations with artists ranging from Twyla Tharp to Allen Ginsberg, Woody Allen to David Bowie, Philip Glass has had an extraordinary and unprecedented impact upon the musical and intellectual life of his times. His associations, personal and professional, with leading rock, pop and world-music artists date back to the 1960s, including the beginning of his collaborative relationship with artist Robert Wilson. Much of his early work was based on the extended reiteration of brief, elegant melodic fragments that wove in and out of an aural tapestry. That compositional minimalism has been and continues to be an obvious source of inspiration for electronic producers. In the past 25 years, Glass has composed more than twenty operas, eight symphonies, two piano concertos and concertos for violin, piano, timpani, and saxophone quartet and orchestra as well as film soundtracks. He presents lectures, workshops, and solo keyboard performances around the world, and continues to appear regularly with the Philip Glass Ensemble.