Six months after a rev­o­lu­tion broke out in Libya, rebels have pushed into the cap­ital city of Tripoli and appear to have Moammar Gad­hafi — the country’s leader for the last 42 years — on the run. We asked Denis Sul­livan — pro­fessor of polit­ical sci­ence and director of Northeastern’s inter­na­tional affairs pro­gram and the Middle East Center for Peace, Cul­ture and Devel­op­ment — to explain how the ongoing con­flict will affect the future sta­bility of the region.