These principles provide a foundation for negotiations. Palestinians should know the territorial outlines of their state; Israelis should know that their basic security concerns will be met. I'm aware that these steps alone will not resolve the conflict, because two wrenching and emotional issues will remain: the future of Jerusalem, and the fate of Palestinian refugees. But moving forward now on the basis of territory and security provides a foundation to resolve those two issues in a way that is just and fair, and that respects the rights and aspirations of both Israelis and Palestinians.