Revolutionary democracy replaced Marxism–Leninism as the EPRDF's official ideology in the early 1990s, not because the front had lost their belief in Marxism, but rather because of the international situation (the Soviet Union was dissolved in 1991). The main message of Revolutionary Democracy, similar to that found in Marxist–Leninist thought, is that a vanguard party should rule because it represents the people and has "supposedly superior knowledge of the nature of social development conferred on them by the EPRDF ideology." Similar to Marxism–Leninism, the EPRDF prefers to categorize society into classes such as the peasantry, the bourgeoisie, the proletariat and the comprador bourgeoisie and considers its main adversary to be imperialism, that is free market capitalist states.