Doctrine advanced by Leibniz to explain the fact that the world of experience is not chaotic, although each monad develops without relation to any other, purely in virtue of its own internal nature. The solution was that just as two clocks can tick in time with each other without interaction and without perpetual interference maintaining a connection between them, but purely because each is properly constructed, so a creating God can from the beginning ensure the harmony of each monad’s development with that of the others. The doctrine was criticized by Foucher as a version of occasionalism.