Explore the concept of criticality as a balance between robustness and adaptability in this 45-minute lecture from the Santa Fe Institute. Delve into the intricate relationship between system stability and flexibility, examining how critical states emerge at the intersection of these seemingly opposing forces. Gain insights into how this balance manifests in various complex systems, from biological organisms to social structures and technological networks. Discover the implications of criticality for understanding and designing resilient systems capable of both maintaining stability and adapting to changing environments.