 Labour Party minister Peter Hain has written in support of libertarian socialism, identifying an axis involving a "bottom-up vision of socialism, with anarchists at the revolutionary end and democratic socialists [such as himself] at its reformist end" as opposed to the axis of state socialism with Marxist–Leninists at the revolutionary end and social democrats at the reformist end.Another recent mainstream Labour politician who has been described as a libertarian socialist is Robin Cook.Defined in this way, libertarian socialism in the contemporary political mainstream is distinguished from modern social democracy and democratic socialism principally by its political decentralism rather than by its economics.