The documents discuss the past, present, and future of mainline Protestant churches. In the past, mainline churches were privileged and powerful but became marginalized after the 1970s. Another narrative is that mainline churches were courageous in addressing issues like science, race, poverty, and human sexuality. The documents explore potential for reinvention and rebirth through a new, emerging, missional form of Christian faith. Emerging churches may help mainline churches transition from a sideline to a mainstream role by embracing flexibility, diversity, and new forms of leadership and identity.