raison d'etre

Unrestrained power, of course, is the president’s raison d’être.

Lowell, spurned in his romantic life and treated as a black sheep by his dynastic family, found in Mars a calling, a raison d’être.

Fundamentally, the format's raison d'être is now under question.

Instead of a unified empire, the smaller kingdoms of the Heptarchy still dominate, their various dangerous machinations providing the raison d’être for the differing orders.

Reborn as a private citizen, Musk began criticizing the major Republican spending bill working its way through the bowels of Congress—specifically in regards to the trillions of dollars it will add to the national debt, obliterating what was DOGE’s raison d’être.