Earlier quoted context omitted.
We assign those rights as a society and, more relevantly here, as a political system. The people who draft our constitutions and (like for all political norms) those who create our political discourse have more influence in defining them than the general population, but these norms have to be agreed to by a fairly large swathe of society to be effective.
> fairly large swathe of society I don't think a majority necessarily carries power. The uber rich and intelligence agencies carry far more power than any mass of citizens.
b) Elites exert control by persuasion; they control the discourse, they organize larger movements, &c. There are still limits to what popular opinion will go along with.
c) Intelligence agencies are, in most rich democratic countries, not a major lever of political power. Government economic institutions, police, courts, and the like are much more influential in both day-to-day lives and in shaping popular conceptions of the "rules of the game".