Labor internationalism has historically developed in response to the increasing globalization of capital, but economic factors in themselves do not provide a sufficient explanation for the relative success of international solidarity in specific geographical and historical contexts. In the past, movements of international solidarity have tended to coalesce where inclusive class‐based mobilizations in individual countries have polarized local class conflicts in ways that suggest a convergence of working‐class interests on the international plane. As an emergent strategy of economistic labor organizations in various sectors of the capitalist world economy, however, internationalism may in fact promote the politicization of economic trade union struggles and thus catalyze broader levels of class solidarity and unity on the national and local pla