"The Fluxus movement... developed its 'anti-art', anti-commercial aesthetics under the leadership of George Maciunas. Fluxus staged a series of festivals in Paris, Copenhagen, Amsterdam, London and New York, with avant-garde performances often spilling out into the street. Most of the experimental artists of the period, including Joseph Beuys, Yoko Ono and Nam June Paik, took part in Fluxus events. The movement, which still continues, played an important role in the opening up of definitions of what art can be."