Legitimacy
Legitimacy is the recognition that a government or an exercise of power is entitled to make binding decisions — that its authority is rightful, not merely imposed. In the American system, legitimacy rests on popular sovereignty: the Constitution opens "We the People," and the government has only the powers the people granted it through ratification and amendment. Legitimacy is maintained by process — free elections, the rule of law, and peaceful transfers of power — which is why procedures in the Constitution are more than technicalities: they are what makes outcomes binding on people who disagreed with them.
Legitimacy is the recognition that a government or an exercise of power is entitled to make binding decisions — that its authority is rightful, not merely imposed. In the American system, legitimacy rests on popular sovereignty: the Constitution opens “We the People,” and the government has only the powers the people granted it through ratification and amendment. Legitimacy is maintained by process — free elections, the rule of law, and peaceful transfers of power — which is why procedures in the Constitution are more than technicalities: they are what makes outcomes binding on people who disagreed with them.
Example: The Constitution provides that it takes effect and may be amended only by prescribed majorities of the people representatives (“Ratification of the Conventions of nine States” to establish it; Article V amendments) — grounding the entire system in an act of popular consent rather than force.
Common misconception: Legality and legitimacy are not the same thing. A rule can be technically valid yet lose public acceptance, and a popular action can lack legal authority. The constitutional system is designed so legitimacy and legality stay together: decisions follow agreed processes, and there are lawful ways to change any of it.
Sources: Basic Principles Underlying the Constitution (Introductory Annotations) | Constitution Annotated"