199 ONE:Our philosopher appears to more advantage as a critic than as a religious dogmatist. He meets the Stoic belief in Providence by pointing out the undeniable prevalence of evils which omnipotent benevolence could not be supposed to tolerate; the Stoic optimism, with its doctrine, still a popular one, that all things were created for the good of man, by a reference to the glaring defects which, on that hypothesis, would vitiate the arrangements of Nature; the Stoic appeal to omens and prophecies by showing the purely accidental character of their fulfilment.160 But he trusts most of all to a radically different explanation of the world, an explanation82 which everywhere substitutes mechanical causation for design. Only one among the older systems��the atomism of Democritus��had consistently carried out such a conception of Nature, and this, accordingly, Epicurus adopts in its main outlines.