Governance is the set of responsibilities and practices exercised by the board and management to ensure that objectives are met and risks are managed. That definition comes from the Collège des administrateurs de sociétés, and its precision is the point: the board and management appear in the same sentence without collapsing into the same job. Most of the board dysfunction we encounter traces back to that line going soft.
The division is concrete, not philosophical. The board decides major directions, sets long-term objectives, adopts policies and the budget, and evaluates management. Management runs day-to-day operations, implements the strategic plan, and informs the board. Three duties bind every director to that mandate — care and diligence, honesty and loyalty, and the organization's interest ahead of any other. A conflict, whether real, potential or merely apparent, is disclosed without delay, and the director steps back from the discussion and abstains from the vote.