Henri-Benjamin Constant de Rebecque (French: [kɔ̃stɑ̃]; 25 October 1767 – 8 December 1830), or simply Benjamin Constant, was a Swiss political thinker, activist and writer on political theory and religion. A committed republican from 1795, he backed the coup d'état of 18 Fructidor (4 September 1797) and the following one on 18 Brumaire (9 November 1799). During the Consulat, in 1800 he became the leader of the Liberal Opposition.
https://en.wikipedia.org/wiki/Benjamin_Constant