What is the great desideratrum madison refers to

Hello.

The Great desideratrum Madison refers to  sacrifice self-interest for the common good.

"Desideratum" is a Latin word meaning "thing to be desired." 

And he's saying that the most important thing about a government is that it be designed in such a way that it (1) doesn't unfairly favor one interest group over another, and (2) doesn't exercise power for its own sake, to make itself more powerful and rich at the expense of society as a whole.

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*to sacrifice self-interest for the common good
*to allow greater liberty to act in one's own self-interest
*to eliminate the existence of factions whatever the cost
*to guard against the influence of factions while preserving liberty

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