Scale is the phenomenon of an organization growing big. The principles of growth have been known for a long time, but the pace and the means of growth have increased exponentially in the last few decades. Scale refers to this exponential growth and now dominates many conversations in the business world. But scale didn’t start with business. Scale has been part of God’s redemptive purpose from the beginning. Whenever a church talks about its discipleship mission, it is talking about scale. Scale can accomplish much good, but scale also can destroy. It is often a catalyst for movements that can promote love for others, or lead to human destruction. This book explains the cultural and social effects of scale and identifies the guiding principles for scale that create movements that bring glory to God. I call this approach Redemptive Scale. Dr. Mark Snyder is an example of what someone can scale through a heart of love. After successfully scaling a groundbreaking medical solution, Mark followed God’s call to apply that solution to one of the greatest medical problems in the world, founding Sustainable Medical Missions. In this book, we will follow this remarkable journey of Redemptive Scale and explore the principles that guided Mark. My hope is that this story inspires you to scale an idea close to your heart—a ministry, a business, a view of the world—that leads others to know God personally and live for his glory.