In Chile the historic Liberal Party ceased to exist in 1966 when it merged with the United Conservative Party, giving rise to the National Party which supported the coup d'état of 1973 However historical liberal ideas such as the defence of civil rights were not practised during the dictatorship. The system established in Chile during the dictatorship was not challenged much until the late 2000s and early 2010s. The Chilean student protests of 2011 showed for the first time in 35 years the discomfort of a group of people with the Chilean political system which was criticized for excessively favouring the privatization of education. The demonstrations criticized using the market as the main resource allocator and the private sector to manage many public services. The criticism also targeted the constitution, since major legislative changes require super-majorities in the congress while the electoral system favours two political blocs, which impedes political processes.