Open Systems: Rethinking Art

Open Systems: Rethinking Art c.1970 brings together the work of international artists who radically rethought the object of art in the late 1960s and 1970s. The featured artists sought to connect with the increasingly urgent political developments of the decade and make their work more responsive to the world around them.
The exhibition begins with a room devoted to the cube exploring how artists reacted and rebelled against it.
Sounds interesting
At the Tate Modern in London from June 1, 2005.