Both the United States and France have had many emulators over the last two centuries, which have seen the number of nation states increase exponentially as the old empires died out or collapsed. When the Spanish American Empire revolted en masse between 1810 and 1825, led by Simon Bolivar and others, most of the new Latin American countries which emerged, with some brief aberrations from the pattern, chose to imitate the United States and adopt a republican system with separate elected Presidential and Legislative Branches. When the French Empire dissolved in the 1950s and ‘60s, most of the new countries chose to adopt a French-style republican system.