The Democratic and Popular Union (Spanish: Unidad Democrática y Popular) (1977–84) was a Bolivian umbrella political alliance uniting various smaller left-wing parties. It was formed in 1977 by former president Hernán Siles Zuazo and consisted chiefly of Siles' Movimiento Nationalista Revolutionario de Izquierda (Leftwing Revolutionary Nationalist Movement), a spin-off of the Moviminento Nacionalista Revolucionario (Revolutionary Nationalist Movement), and Jaime Paz Zamora's Movimiento de Izquierda Revolucionaria (Revolutionary Left Movement). The coalition became extremely popular with Bolivian voters in the late 1970s, due to fatigue with the military dictatorships that for the most controlled the country since 1964.