After studying philosophy and law, Bergasse became a lawyer at the Parlement of Paris.

In the Kornmann case, his quarrel with Beaumarchais made him a famous personality.

In 1789, he was elected Deputy of the Estates-General and become an important face of the Monarchiens Party.

During the French Revolution, he created a particular political and constitutional thought inspired by the British and American models and develops a theory of the sovereignty of universal reason.

He delivered an important report to the National Assembly on the organization of justice.