1670s as a philosophical doctrine that all things are determined by fate, from fatal + -ism. Meaning "disposition to accept all conditions and events as inevitable" is from 1734.
Fatalism is a doctrine which does not recognize the determination of all events by causes, in the ordinary sense; holding, on the contrary, that a certain foreordained result will come about, no matter what may be done to prevent it. Fatalism is thus directly opposed to necessitarianism, according to which every event is determined by the events which immediately precede it in a mechanical way. [Century Dictionary]