There Is Nothing Without A Reason

A compressed statement of the principium rationis sufficientis — the principle of sufficient reason — which Gottfried Wilhelm Leibniz regarded as one of the two great pillars of rational thought alongside the principle of non-contradiction. In the Monadology (1714) and the Theodicy (1710) he used it to argue that God must have had a sufficient reason (the goodness of this world) to create rather than refrain from creating. Immanuel Kant later wrestled extensively with the principle's scope and limits in the Critique of Pure Reason.