Primary purpose is to increase free trade across Canada U.S. Mexico.
Mexico became independent from Spain in 1821. From 1876 to 1911, Porfirio Diaz dominated Mexican leadership, bringing in foreign investment in railroads, mining and petroleum. In 1910, the Mexican Revolution began, ending with a new ruling party and Constitution. In 1938 all foreign oil company interests were nationalized into PE-Mex. After WWII, Mexico raised tariffs and otherwise became more isolationist with respect to trade.