Complexity is a gift that you can make available for the successful implementation of projects, to create a new order or to change an existing one. Based on scientific facts, the authors present a systematic approach, which integrates the wide range of facets of complexity and gives practical recommendations for dealing with complexity in projects. The methods paradigm in project management is currently massive upheaval. Projects are complex entities that cannot be solved with traditional methods. Complexity and the associated phenomenon of self-organization is a natural but hidden designer. It offers a great opportunity by being used as a key driver for the implementation of projects. This requires to identify the principles of complexity and to use these for project management. In this book, the latest findings from the natural sciences and brain research are used and transferred in a practice-oriented framework. The authors describe the means of complexity regulation in projects and how self-organization for the management of projects can be applied.