What did not last forever? The drought, the abandonment of Chaco Canyon? Chaco Canyon is still not inhabited.

fourteenth amendment

in 1862, president lincoln's emancipation proclamation opened the door for african americans to enlist in the union army. although many had wanted to join the war effort earlier, they were prohibited from enlisting by a federal law dating back to 1792.

explanation:

a direct vote in which an entire electorate is invited to vote on a particular proposal. this may result in the adoption of a new law.