In the broad scope of understanding how we as humans in general, and Christians specifically, are called to live in a world with violence, there are a few big ideas. The first is Just War, the second is Pacifism, and the third is Just Peacemaking.
But God is listening. God hears the prayers of God's people. The question is, are we listening? For God, who hears the prayers of his people, is calling us to listen as well. God's justice is a collective project.