Socialist League may refer to one of several organisations:
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Socialist League (Australia)
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Socialist League (Canada)
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Socialist League (Finland)
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Socialist League (Germany)
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Socialist League (Italy)
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Socialist League (Sweden)
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Socialist League (Venezuela)
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Socialist League (UK, 1885), a split from the Social Democratic Federation associated with William Morris
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Socialist League (UK, 1932), a split from the Independent Labour Party associated with Stafford Cripps
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Socialist Action (UK), founded 1982, originally officially known as the Socialist League
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Socialist League of Palestine
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Political party disambiguation pages