Who came up with the idea of popular sovereignty and what did that concept mean?

Benjamin Franklin expressed his idea of sovereignty. Sovereignty is the principle that the authority of a state and its government are created and sustained by the consent of its people, through their elected representatives (Rule by the People), who are the source of all political power.

Explanation:

Lewis Cass of Michigan, who was a Democratic candidate for President in the election of 1848, coined the term "popular sovereignty." The idea of" popular sovereignty" was whether or not slavery would exist there.

Explanation:

Lewis Cass came up with the term and the idea was about slavery.

I hope this helps let me know if im right :D

we can argue that appeasement caused world war ii because it allowed hitler and the nazis to build germany’s military power until it was strong enough to fight a major war. additionally, appeasement emboldened germany, making it think the allies would never have the will to fight. this made germany much more aggressive and encouraged it to take the steps that eventually led to war.