22nd
The Twenty-Second Amendment (Amendment XXII) to the Constitution of the United States restricts the number of times a person is eligible for election to the office of President of the United States to two and sets additional requirements of eligibility for presidents who succeed in their predecessors' unexpired terms.
25th
It clarifies that if the president dies, resigns, or is suspended from office, the vice president becomes president (as opposed to the acting president), and specifies protocols for filling a vacancy in the vice president's office and reacting to presidential disabilities.
Uncle Tom's Cabin was a novel written by Harriet Beecher Stowe about slavery in the south. When people read it, they started to realize and be informed about what slavery was like, so more people started being opposed to slavery (because before this, people in the north tended to not care) and more people became abolitionists.