A "Machiavellian moment" is that moment when a new republic first confronts the problem of maintaining the stability of its ideals and institutions. Machiavellian thought was a response to a series of crises facing early 16th century Florence in which a seemingly virtuous state was on the cusp of destruction. In response, Machiavelli sought to revive classical republican ideals. Works like The Prince, some pre-English Civil War thinkers, and a group of American Revolutionary personalities all faced similar such moments and offered related sets of answers.
The Machiavellian Moment has come to represent the so-called republican synthesis, which holds that America was born with a fear of corruption and a desire to promote classical virtue.