Book excerpt: The world continues to globalize and urbanize at a rapid pace. Technology and social media have transformed how people interact. Despite recent advances and innovations, countless people groups across the globe still lack access to the gospel of Jesus Christ. How should the church mobilize to reach the world? Now more than ever before, Christians need to be aware of the changing landscape before us. Missions expert David Sills shares this one-stop shop of key global challenges confronting Christian mission in the twenty-first century. In ten topical chapters he identifies ways practitioners can be faithful to God's call, help without hurting, reach oral learners, conduct short-term missions responsibly, engage in business as mission strategically and much more. While the world is fluid, God's mission endures. Discover anew how the eternal gospel can make its way to every tribe and nation.