This article tracks the activism of the mining justice social movement since the late 1990s. As a starting point, this movement is conceptualized as a transnational political project that seeks to transform the terms of corporate resource extraction pursuant to the political and legal arrangements of neo-liberal economic globalization. In this context, the author reflects on the movement’s most significant human rights-oriented law reform projects in the Americas: Indigenous peoples’ right-to-consultation legislation in several Latin American countries and a series of non-judicial grievance mechanisms in Canada in response to the right to remedy norm in international law. Drawing on existing research, the author concludes that in both cases the state has responded with law and policy reforms that fall far short of achieving advocates’ objectives. The author argues that these shortcomings are due in part to the persistence of three liberal/neo-liberal ideologies in the reforms in question: formalism, voluntarism, and privatism. To better understand and explain these findings, the author turns to three critical theories of human rights legal activism: pragmatism, left critique/critical legal liberalism, and counter-hegemony. Examining the work of a range of scholars writing under the banner of each theory, the author identifies key debates and insights that may be instructive as the mining justice movement, and related social and environmental justice movements, continue to aspire towards a law reform agenda capable of addressing pressing global environmental and social justice issues.