One of the more frustrating aspects of Marxian approaches to dialectics is the seemingly blind indifference to understanding the role of the basic concepts of space and time. It is even more irritating to find that some of the most interesting dialectical approaches to space and time can be found in the writings of those, such as Leibniz and Alfred North Whitehead, who otherwise have little or no place in the Marxian canon. So why this lacuna in Marxian theorizing? And how can we begin to make up for the absence?