“Culture eats strategy for lunch.” That quote is attributed to Peter Drucker, the father of modern management theory. It expresses the fundamental importance of culture—that culture drives people’s behavior, either by achieving the organizational or team strategy, or by undermining it.

Every organization and every team within it has a culture, whether intentional and driven by its leadership or not. It is defined by the behaviors of leaders and the behaviors that they incentivize and tolerate in others.