The best replacement for fatalism is determinism.

The best alternatives to fatalism are rated as following:
★★★★★  determinism
★★★  free will
★★  providence
★★  existentialism
★★  nihilism
★  foresight
★  predestination

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Speaking about fatalism, one probably shouldn't forget about determinism.

Other search terms related to fatalism and their ratings are:
★★★★★ determinism
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fatalism
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