At heart, nationalism is an ideology of class collaboration. It functions to create an imagined community of shared interests and in doing so to hide the real, material interests of the classes which comprise the population. The 'national interest' is a weapon against the working class, and an attempt to rally the ruled behind the interests of their rulers. [...] Anarchist communists do not simply oppose nationalism because it is bound up in racism and parochial bigotry. It undoubtedly fosters these things, and has mobilised them through history. Organising against them is a key part of anarchist politics. But nationalism does not require them to function. Nationalism can be liberal, cosmopolitan and tolerant, defining the 'common interest' of 'the people' in ways which do not require a single 'race'. Even the most extreme nationalist ideologies, such as fascism, can co-exist with the acceptance of a multiracial society, as was the case with the Brazilian Integralist movement. Nationalism uses what works – it utilises whatever superficial attribute is effective to bind society together behind it.