  Leibniz was aware of this argument denying God's obligation to create the best, but he was firmly committed to rejecting it, in virtue of a central principle of his philosophical system, the Principle of Sufficient Reason. According to the Principle of Sufficient Reason, for any state of affairs, there must be a sufficient reason that explains why that state of affairs and not some other state of affairs obtains. When it comes to our world, then, there must be some reason that explains why it, and not some other world, obtains. But there can be no such reason if it is the case that the goodness of worlds increases ad infinitum. Leibniz therefore concluded that there can be no infinite continuum of worlds.