The purpose of this paper is to shed light on what liberal states should tolerate outside their borders. This requires definitions of `liberalism, ́ `toleration, ́ and `state. ́ In the first section of this paper, I briefly indicate how I use those and other terms necessary to the discussion and introduce the normative principle I take liberals to be committed to. In the second section, I continue clearing the path for the rest of my discussion. In the rest of (...) the paper, I draw conclusions about what liberals should tolerate outside their state that I believe follow from the proffered definitions and principles. I limit myself to interference aimed at providing humanitarian aid, but do so in a way that is meant to provide resources for thinking about other sorts of interventions. In the third section, I consider humanitarian interventions done with the permis- sion of the other state and will point toward a toleration-based view; here we are really talking about non-toleration of suffering. In the fourth section, I consider humanitarian interventions done without the permission of the other state; here we are talking about non-toleration of a state that harms its residents. I consider an objection in section five. (shrink)