The Girondins favored exporting the revolution and opposed a concentration of power in Paris. He collaborated on the Mercure de France and the Courier de l'Europe , which sympathized with the insurgents in the American colonies. With the outbreak of the revolution in July , he became one of its most vocal supporters. As a member of the Legislative Assembly , Brissot advocated for war against Austria and other European powers in order to secure France's revolutionary gains, which led to the War of the First Coalition in He was friendly with Jean-Paul Marat , but in they were the greatest enemies.
On 3 April , Maximilien Robespierre declared in the Convention that the whole war was a prepared game between Dumouriez and Brissot to overthrow the First French Republic. Brissot was born in Chartres , the 13th child of a wealthy traiteur ; but nine of his siblings died at infancy. In he entered college, studying Latin and developing an admiration for the works of Voltaire, Diderot, and Rousseau. Transitioning to a career path, he began his tenure as a law clerk in , initially in Chartres and later, from , at the Parlement of Paris.
In Madame du Barry introduced him to Voltaire. In the same year he briefly visited London upon invitation. He relocated to Boulogne-sur-Mer when he was appointed editor of "Courier de l'Europe", a periodical that did not do well and failed.
Brissot sent a summary to Voltaire, who praised his style and energy in a letter. Meanwhile, a law degree hardly charmed him, Brissot was more interested in linguistics and decided to become a journalist. Brissot visited London where he got engaged in establishing an Academy of Arts and Sciences; he lived at Newman Street with his wife and younger brother.
Brissot had a falling out with Catholicism, and wrote about his disagreements with the church's hierarchical system.
