"What Happened in and to Moral Philosophy in the Twentieth century? is a volume of essays originally presented at University College Dublin in 2009 to celebrate the eightieth birthday of Alasdair MacIntyre--a protagonist at the center of that very question. What marks this collection is the unusual range of approaches and perspectives, representing divergent and even contradictory positions. Such variety reflects MacIntyre's own intellectual trajectory, which led him to engage successively with various schools of thought: analytic, Marxist, Christian, atheist, Aristotelian, Augustinian, and Thomist. This collection presents a unique profile of twentieth-century moral philosophy and is itself an original contribution to ongoing debate."--Jacket.