David R. Montgomery is a Professor of Earth and Space Sciences at the University of Washington in Seattle, where he is a member of the Quaternary Research Center. Montgomery received his B.S. in geology from Stanford University in 1984, and his Ph.D. in geomorphology from University of California, Berkeley in 1991. His research addresses the evolution of topography and the influence of geomorphological processes on ecosystems and human societies. His published work includes studies of the role of topsoil in human civilization, the evolution and near-extirpation of salmon, geomorphological processes in mountain drainage basins, the evolution of mountain ranges, and the use of digital topography. He has conducted field research in eastern Tibet, South America, the Philippines, Alaska, and th