This article examines the particular moral obligations of solidarity focusing on the solidary commitment against injustice or oppression. I argue that political solidarity entails three relationships—to other participants in action, to a cause or goal, and to those outside the unity of political solidarity. These relationships inform certain obligations. Activism is one of those obligations and I argue that violent activism is incompatible with the other relations and duties of solidarity. Activists may find themselves confronted with a difficult choice between (...) respecting the relationships of political solidarity or employing physical violence in resistant self-defense against oppressive practices. -/- . (shrink)