 The fact that Kant focuses on the debate between the Leibnizians and the Newtonians is perplexing given his evident lack of interest, within the context of the Critique, in problems concerning motion. One of Newton’s principal reasons for distinguishing between an “absolute” (or “mathematical”) and a “relative” (or “common”) conception of space is to ground a distinction between true and merely relative motion. Newton construes the true motion of an object, as opposed to its merely “apparent” motion, not in terms of its change in relations to other objects, as Descartes had done in his Principles, but in terms of its change of absolute place (Janiak 2008, chapter five). So the very idea of absolute or mathematical space helps to express what true motion is. Discovering the true, as opposed to the merely apparent, motions of objects, so that one can then determine the forces that cause these true motions, represents one of the principal goals of Newton’s Principia.