Some time ago, Ralph Winter brilliantly identified three eras of modern missions: Era 1: William Carey focused on the coastlands; Era 2: Hudson Taylor focused on the inlands; Era 3: Donald McGavran and Cameron Townsend focused on unreached peoples. With all the fast and furious changes swirling around us today in twenty-first century missions, have we entered a Fourth Era? If so, who are the people primarily involved? How are they selected? How are they trained? How long do they serve? Has the Third Era ministry focus--reaching the unreached--changed? If so, to what? Are there any successful...