Hermeneutical Theology and the Imperative of Public Ethics is a groundbreaking attempt to present constructive missional theology in an integrative and interdisciplinary framework as it provocatively utilizes and contextualizes Reformation theology and hermeneutics concerning ethical theology embedded within the wider horizon of World Christianity. Mission as constructive theology is explored and refined in an hermeneutical and interdisciplinary fashion, underlying a new horizon of postcolonial theology and mission in light of God’s act of speech. Missional church founded up God’s grace of justification and Christ’s diakonia of reconciliation becomes ethically oriented public church as it is engaged in mutireligious diversity of people’s lives and lifeworld in the postcolonial context of World Christianity.