The historical event known as Conceptual Art released two related if seemingly opposed forces that continue to shape much of what has followed: On the one hand, there is the centripetal, inward-looking self-examination of art’s own conditions of possibility and, on the other hand, there is the centrifugal, outward-looking expansion of art into the adjacent disciplines of music, theater and design that has generated a number of rich and productive back-and-forth movements in the process.