desideratum

something desired as a necessity

The desideratum of the environmental group is that motorists should rely on carpooling.

"Plain English" such a one will call his desideratum, as one might call the viands on a New Cut barrow

The only social desideratum from the perspective of justice might be some H, but a principle of fairness might constrain the way H is allocated, such that it’s not required to feed everyone to the Utility Monster, if there are any in the society.

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