Holacracy is an alternative system for structuring organizations that replaces the traditional management hierarchy. It defines small, clear roles for individuals with authority to make decisions within clear boundaries. A governance process allows roles and boundaries to evolve based on tensions between "what is" and "what could be." This provides real empowerment through clear expectations and a way to change expectations over time. Holacracy has been implemented at large companies like Zappos to provide a flexible, tension-driven system for rapid change.