The Movement for Socialism-Political Instrument for the Sovereignty of the Peoples (Spanish: Movimiento al Socialismo-Instrumento Político por la Soberanía de los Pueblos, abbreviated MAS-IPSP, or simply MAS), alternately referred to as "Movement Toward Socialism" or "Movement to Socialism", is a left-wing, socialist, Bolivian political organization led by Evo Morales, founded in 1998. Its followers are known as masistas. MAS-IPSP has governed the country since 2006, following the first ever majority victory by a single party in the December 2005 elections. MAS-IPSP evolved out of the movement to defend the interests of coca growers. Evo Morales has articulated the goals of his party and popular organizations as the need to achieve national unity, and to develop a new hydrocarbon law which guarantees 50% of revenue to Bolivia, although political leaders of MAS-IPSP recently interviewed showed interest in complete nationalization of the fossil fuel industries.