In his book "The Peaceable Kingdom" Hauerwas offers commentary on two classic essays written by the Niebuhrs for "The Christian Century" on the subject of the Conflict in Manchuria. In the first essay, entitled "The Grace of Doing Nothing", H. Richard Niebuhr argues that humans are self-interested and egoistic and that Christians, because they are subject to these same flaws, should remain non-violent even in a time of war. In his essay in response, entitled "Must We Do Nothing?", Reinhold Niebuhr argues that Christians must have a self-awareness about their own sinfulness and self-interestedness, but must sometimes use force to protect certain ideals and people. In his commentary Hauerwas acknowledges that both brothers make important points, but critiques Reinhold's view, ultimately agreeing with H. Richard Niebuhr.