 For Wolff, Lambert, and Moses Mendelssohn, time is real insofar as it is an objective measure of change (cf. Falkenstein 1991 for discussion). Change is a constant feature of existing reality in that real individuals are finite and created beings with a determinate duration. Real individuals come into and go out of existence. Time, therefore, is applicable to the series of changes that occur within a given individual and, in the same respect, it is applicable to the totality of all the individuals that compose the world-whole. Thus for Wolff there is a meaningful sense in which real individuals and the world-whole (itself) are “in time”. This is not to say, however, that time is granted its own ontological existence. In Lambert’s words, time is not a substance (i.e., something real in-and-of itself). More precisely, time is the measure of the objective order of change that real things undergo.