Final answer:
The word that best completes the sentence is "Idealism".
Step-by-step explanation:
The sentence is asking for the word that best completes it. The sentence mentions a departure from something, so we are looking for a word that can describe a departure from idealism, redemption, sanity, or wisdom. The best word that fits this context is Idealism. Departure from idealism means moving away from the belief that things can be perfect or that a utopian society can be achieved.
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