We can't literally talk with everybody else on the planet or even with representatives of every group. But we can be in favor of the respectful exchange of ideas in ways that don't presuppose that all the right answers are on our own side. Still, we should all have moral bottom lines. Once genocide or torture begins the priority shifts from understanding to stopping it. One hope I have for the global conversation as instantiated in human rights treaties is that we are slowly coming to consensus on certain moral baselines.