Historian Daniel Walker Howe talked about his book What Hath God Wrought: The Transformation of America, 1815-1848, a volume in "The Oxford History of the United States" published by Oxford University Press. In his book Professor Howe explores the history of the United States from 1815 to 1848. He documents the transformation of the country from a rural landscape to the development of economic centers and expansion to the Pacific. After his presentation he responded to questions from members of the audience. Daniel Walker Howe is an American history professor emeritus at Oxford University and University of California, Los Angeles. His other books include The Unitarian Conscience: Harvard Moral Philosophy, 1805-1861 and Making the American Self: Jonathan Edwards to Abraham Lincoln.