Management is about coping with complexity. Without good management, organizations become chaotic in ways that threaten their survival. Good management brings order and consistency through the unending practice of (a) setting tough goals, (b) establishing processes to reach them, (c) carrying out those processes, and (d) carefully learning from the results.
Team. As a manager, it's your responsibility to create high performance teams. High performance teams are fast. They're always looking to accelerate their OODA loops. They value speed not just for it's own sake, but also because fast teams are necessarily decentralized — low in friction, and high in trust.
Organization. The success of your organization has more to do with clarity of a shared vision, common principles, and strength of belief in them, than to assets, expertise, operating ability or management competence, important as they may be.