Agile concepts have been used for decades (if not centuries) in complexity theory, war theory, project management, sociology, and most sciences. Agile practices show us how to "think about" and manage the work required for solving complicated and complex problems. The Scrum Guide says Scrum is for solving complex adaptive problems. In the last 25 years or so, agile concepts have become popular in software development, and there are several pathways you could take in order to be agile. One of these pathways is Scrum, the most popular agile software process in the world.This study guide has two purposes. The first is to help you pass the Certified Scrum Master test. The second is to give you a deeper understanding of Scrum so that you can begin to apply it successfully to your real world needs.