All evil results from the non-adaptation of constitution to conditions. This is true of everything that lives. Does a shrub dwindle in poor soil, or become sickly when deprived of light, or die outright if removed to a cold climate? it is because the harmony between its organization and its circumstances has been destroyed.
Part I, Ch. 2 : The Evanescence of Evil, § 1. - Social Statics (1851)