popular sovereignty is incorrectly written and should be written as "popular sovereignty" being its meaning:
Socio-political concept of the enlightenment that all power comes from the town or the will of the people. The enlightened of the eighteenth century as Rousseau, Voltaire, Montesquieu, Kant.., who considered themselves Liberal, flatly opposed absolutism and above all to the absolutism of divine origin which is summarized in the so-called sentence of Luis XIV of France: " the State am I " and it was the origin of power in God, who went directly to the monarch, which did not have to give explanations to anyone about how he was exercising.
