 If causal determinism is true, then the occurrence of any event (including events involving human deliberation, choice, and action) that does in fact occur was made inevitable by—because it was causally necessitated by—the facts about the past (and the laws of nature) prior to the occurrence of the event. Under these conditions, the facts about the present, and about the future, are uniquely fixed by the facts about the past (and about the laws of nature): given these earlier facts, the present and the future can unfold in only one way. For more, see the  entry on causal determinism.