ABSTRACT
Rivers, according to the ancient Romans, are limes, frontier spaces for interaction and dialogue that divide and join different groups and are subject to inherent conflict. Rivers that cross international boundaries connect countries’ ecosystems, people, and economies to one another. At times this interaction fosters competition and at other times collaboration. Water users, managers, and diplomats need practical strategies to productively manage both, especially as climate change makes already complex social-ecological systems even less predictable and more vulnerable to chronic disasters, such as droughts, floods, and ecosystem changes.
