With the invention of ‘Happenings’ and ‘Environments’, Allan Kaprow embarked upon a career of intellectually rigorous, site-specific, and timed works that defied commoditization and ultimately gave birth to performance and installation art. His seminal work, ‘18 Happenings in 6 parts’, 1959, an evening of seemingly random but carefully choreographed activities, required the participation of both the audience and the performers to complete the piece. ‘Life is much more interesting than art,’ Kaprow wrote. ‘The line between art and life should be kept as fluid, and perhaps indistinct, as possible.’