Amendments can be proposed in Congress when two thirds of both the House and Senate agree. The states can play a role in proposing changes to the Constitution as well: two thirds of the state legislatures must call conventions to propose amendments.
The American Revolution had profound effects on the institution of slavery. Several thousand slaves won their freedom by serving on both sides of the War of Independence. As a result of the Revolution, a surprising number of slaves were manumitted, while thousands of others freed themselves by running away.
