Christian ethics is less a system of principles, rules, or even virtues, and more of a free and open-ended responsible witness to God's gracious action to be with and for others and the world. Postmodernity has left us with the risky uncertainty of knowing and doing the good. It also leaves us with the global risks of political violence and terrorism, economic globalization and financial crisis, and environmental destruction and global climate change. How should Christians respond to these problems? Haddorf creatively explores how Christian ethics is best understood as a witness to God's action, bringing together two of his interests, Christian social ethics and social theory, and the theology and ethics of Karl Barth. Although demanding and sometimes uncertain after postmodern changes, christian ethics enable humankind to remain God's witnesses of love and care for the future, even in a world at risk.