Assistant Professor of Anthropology at Brandeis University, Charles Golden has conducted archaeological research in Belize, Honduras, and Guatemala. In 1997 he began doctoral research at Piedras Negras, Guatemala, and he continues to conduct research in the Usumacinta River region along the modern border of Guatemala and Mexico. Since 2003 he has directed the Sierra del Lacandon Regional Archaeology Project with Andrew Scherer. The project focuses on the dynamic political landscapes that formed within and between the Classic period kingdoms of Piedras Negras, Yaxchilan, and their neighbors. (At Mesoweb/PARI, see Border Problems: Recent Archaeological Research along the Usumacinta River.)