Definition of "necessarianism" [nec•es•sa•ri•an•ism]

• An extreme form of determinism that holds that all phenomena, including the will, are subject to immutable rules of cause and effect; necessitarianism. (noun)

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• "The derivatives, necessitation and necessarianism, in their philosophical signification express the doctrine that the will in all its activity is invariably determined by physical or psychical antecedent conditions (see DETERMINISM; FREE WILL)."
• "In particular, he attacked the notion of "constraint" suggested in the words necessity and necessarianism, whereas only sequence is affirmed."
• "In Leibniz, the prominence given to the principle of sufficient reason, the doctrine that man must choose that which the intellect judges as the better, and the optimistic theory that God Himself has inevitably chosen the present as being the best of all possible worlds, these views, when logically reasoned out, leave very little reality to free will, though Leibniz set himself in marked opposition to the monistic geometrical necessarianism of Spinoza."