The International Workers League - Fourth International was founded by Argentinian Trotskyist Nahuel Moreno and supporters in 1982. It arose from disagreements in the Reunified Fourth International.
In the UK, the International Socialist League are supporters, initially as the Bolshevik Faction of the Workers’ Revolutionary Party (Workers’ Press), before splitting from the latter in 1987. A sympathising group, the International Socalist League of Ireland, was extant in the late 1980s.
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