Joseph A. Bracken, S.J., is a retired professor of theology and director emeritus of the Edward B. Brueggeman Center for Dialogue at Xavier University in Cincinnati, Ohio, and is the author of seven books and editor or co-editor of two other works in the area of philosophical theology. His focus in recent years has been on the God-world relationship both as it figures in the religion and science debate and in interreligious dialogue. He is a long-time student of the philosophy of Alfred North Whitehead but has modified it in some measure so as to make it more compatible with traditional Christian beliefs such as creation out of nothing, the doctrine of the Trinity, and eschatology.

Gary Dorrien is the Reinhold Niebuhr Professor of Social Ethics at Union Theological Seminary and Professor of Religion at Columbia University. An Episcopal priest, he was previously the Parfet Distinguished Professor at Kalamazoo College, where he taught for 18 years and also served as Dean of Stetson Chapel. Prof. Dorrien is the author of 13 books and approximately 175 articles that range across the fields of ethics, social theory, theology, philosophy, politics, and history. Praised for their "intellectual creativity" and "stylish prose," these works include four books on social ethics and economic democracy, two acclaimed books on political neoconservatism, and a trilogy titled The Making of American Liberal Theology: (1) Imagining Progressive Religion; (II) Idealism, Realism, and Modernity; (III) Crisis, Irony, and Postmodernity. A frequent lecturer at universities, divinity schools, conferences, civic groups, and religious gatherings, Prof. Dorrien speaks for the Distinguished Lecturers Program of the Organization of American Historians and is a recent past president of the American Theological Society. In addition to his long involvement in the American Academy of Religion and other professional organizations, Prof. Dorrien has a long record of involvement in social justice and anti-war organizations. His recent book, Imperial Designs, grew out of his extensive lecturing against the U.S.'s invasion and occupation of Iraq. His major work, Social Ethics in the Making, will be published by Blackwell in November 2008, and he is currently completing a book titled Economy, Difference, and Empire.

Catherine Keller is a Professor of Constructive Theology in the Theological and Graduate Schools of Drew University, teaches and writes across a wider range of contemporary theological and religious studies. In her teaching, lecturing and writing, in a multiplicity of religious and secular, scholarly and activist settings, she seeks to midwife a theology of becoming. A work of complicated lineage and open future, it interweaves a postmodern biblical hermeneutic with process cosmology, poststructuralist philosophy and an evolving feminist cosmopolitics. At once constructive and deconstructive in approach, such theology engages questions of ecological, social and spiritual interdependence amidst an irreducible indeterminacy. After studies in Europe and in seminary, she did her doctoral work at Claremont Graduate University with John Cobb, and sustains a warm and active affiliation with the Center for Process Studies. Its pioneering work in postmodernism pluralism, both by way of a Whiteheadian philosophy and progressive Christian activism, continue to inform her work. As director of the annual Drew Transdisciplinary Theological Colloquium since its inception in 2000, she works with colleagues and students to foster a hospitable local setting for planetary conversations. Its postcolonial and pluralist ecumenism involves confessional as well as secular faiths. With the collaboration of Fordham Press, the TTC is producing a rich series of co-edited volumes. She meets monthly and happily for symposia over dinner with her graduate students, an international collective finding their own theological voices rather than echoing hers. She is currently writing on issues of incertitude and interrelatedness as they enfold at once a tradition of Christian mysticism and recent physical cosmology. The thread of radical relationalism that runs through her work here engages the heritage of negative theology, with its deconstructive edge. The robust contemporary affirmations of embodiment characteristic of ecofeminist and Whiteheadian thought tangle with the indeterminacy of postmodern pluralism.