13 When all men have finally acquired the collectivist mentality in this Utopia of a really classless society, the political State, which is now conceived by Communists merely as the instrument by which the proletariat is oppressed by the capitalists, will have lost all reason for its existence and will "wither away." However, until that happy consummation is realized, the State and the powers of the State furnish Communism with the most efficacious and most extensive means for the achievement of its goal.
Source: Divini Redemptoris (Vatican.va)