Effective altruism is a conceptual approach and emerging social movement that uses data-driven reasoning to channel social economy resources toward philanthropic activities. Priority cause areas for effective altruists include global poverty, existential risks to humanity, and animal welfare. Indeed, a significant subset of the movement argues that animal factory farming, in particular, is a problem of great scope, one that is overly neglected and offers the potential for massive reductions in global suffering. This paper explores the philosophical and methodological tenets (...) of these “effective animal advocates,” offering empirical qualitative insight into their motivations and perspectives. The work also considers the implications of the effective altruists’ entrance into the arena of animal advocacy, taking note of how various factions within both the effective altruist and animal protection movements have received their conceptual and practical interventions. The research highlights several potential contributions of the effective animal advocates, as their commitment to evaluate and amplify pragmatic solutions to the problems of animal suffering has the opportunity to shift institutional and consumer behaviors in ways the animal protection movement has struggled to do in the past. At the same time, key issues related to the community’s research rigor and measurability biases, its lack of demographic diversity, and its tendency to valorize corporate-driven technological solutions open it up to criticism from internal and external detractors alike. (shrink)