•Why it earns a slot
The Emancipation Proclamation is the foundational executive act that redefined the Civil War as a war for human freedom and set the legal and military precedent that led to the Thirteenth Amendment's abolition of slavery.
Issued on January 1, 1863, the Emancipation Proclamation declared all enslaved persons in the Confederate states to be free, invoking Lincoln's authority as Commander-in-Chief during the Civil War. It named the specific rebellious states and exempted certain Union-held regions. It also opened the door for freed Black men to serve in the U.S. armed forces.
This distillation is written from the freely available original, which is always the better read when you have the time: gutenberg.org.