"Our study demonstrates that the convergence of information from multiple scientific disciplines helps us explore big and highly relevant questions," Kennett said, "like the potential impact of climate change on society and other questions with enormous social implications.<p>"Climate change worries me, particularly here in the western U.S., but it is really the complexities of societal change in response to climatic perturbations that worry me the most," he added. "The archaeological and historical records provide lessons from the past, and we also have so much more information about our Earth's climate and the potential vulnerabilities in our own sociopolitical systems."