Henri-Benjamin Constant de Rebecque (French: [kɔ̃stɑ̃]; 25 October 1767 – 8 December 1830), or simply Benjamin Constant, was a Swiss-French political activist and writer on politics and religion. He was the author of a partly biographical psychological novel, Adolphe. He was a fervent liberal of the early 19th century who influenced the Trienio Liberal movement in Spain, the Liberal Revolution of 1820 in Portugal, the Greek War of Independence, the November Uprising in Poland, the Belgian Revolution, and Liberalism in Brazil and Mexico.