Institutions grow out of the instincts.
What, according to Nietzsche, is the "first imperative of instinct"?
That "certain things SHOULD NOT BE QUESTIONED".
[TWI IX 40]

Nietzsche finds this instinct alive in the following;

"The Great Artists of government so far - Confucius in China, the Roman Empire, Napoleon and the Popes of the Renaissance".
[Nietzsche WP 129]

It is when the instinct to rule fails that culture degenerates;

"The degeneration of the rulers and the ruling classes has been the cause of the greatest mischief in history!
Without the degeneration of the Roman Caesars and Roman society, the insanity of Christianity would never have come to power".
[WP 874]

This instinct fell again with the degeneration of the French Aristocracy;

"The French Revolution destroyed the instinct for a grand organisation of society ...
The French Revolution as the continuation of Christianity.
Rousseau is the seducer: he again unfetters woman ... then the slaves ... then the poor and the workers. Then the vice-addicts and the sick - all this is moved into the foreground".
[WP 80/94]

But then the question is raised - without a healthy ruling aristocracy can philosophy be possible?

"The new philosopher can arise only in conjunction with a ruling caste, as its highest spiritualisation".
[WP 978]

This is why politics is essential to the Nietzschean project.