This document discusses large systems change, which involves transformation on a global scale over long time frames involving many people and organizations. It provides examples of global action networks that drive systems-level change. It then compares three types of change: incremental, reform, and transformation. Transformation involves questioning purposes and creating previously unimagined possibilities using envisioning logic. The document asks how the different change types relate and how pathways to transformation can address blockages like entrenched power structures. Finally, it presents a model of an open system with different elements that must change for large-scale transformation.