Abstract
This lecture will review two concepts that now feature prominently in environmental histories of the modern world and in global change science: The Great Acceleration and the Anthropocene. It will present evidence, drawn mainly from collaborations in the Anthropocene Working Group, for the view that both the Great Acceleration and the Anthropocene began around 1950; that the Great Acceleration has begun to slow; but that the Anthropocene is set to last for many millennia yet to come.