nato does not have any democratic principles in its rules because was assumed that everyone in it wants the same thing, so everything needs to be done with full agreement.

Consensus decision-making is a group decision-making process in which participants work together to develop proposals for actions that achieve a broad acceptance. Consensus is reached when everyone in the group assents to a decision (or almost everyone; see stand aside) even if some do not fully agree to or support all aspects of it. It differs from simple unanimity, which requires all participants to support a decision. Consensus decision-making in a democracy is consensus democracy.[1]

https://en.wikipedia.org/wiki/Consensus_decision-making

Consensus is far more democratic than majority rule, which is the norm in most Western democracies.

https://en.wikipedia.org/wiki/Tyranny_of_the_majority