This study examines not only the objects and processes that make up the artworlds of human history, but also the social and cultural circumstances, the historicised contexts that bring about their making, frame their functioning, inform their properties and influence their effects, both at the time of their creation and throughout their subsequent biographies.In the short span that “art” has played a part in human life, one may conceive of time as a social river, with a strong current towards the capricious mainstream, and eddies and quiet pools near the banks. The current will flow faster in spate and slower in drought. But it will be forever in motion. It will be unpredictable. Nothing will stop its inexorable force. Art runs in that social river, subject to the flow and chance of time.