Sad because you are sad about being sad and others get sad because your sad
I'm pretty sure that popular sovereignty is the idea that power lies with the people. I hope this helps you out :)
The original purpose of dropping atomic bombs were to, instead of sending in troops, drop an atomic bomb on your city of choice and wipe out everyone in a mile's radius. That is the short term effect. But the long term effects include nuclear radiation which poisons people in a much larger radius, while contaminating the environment for an extended period of time.
Hope this helps!
Founders believed in states' rights, and wanted them to think mostly for themselves with the aid of the federal government.