How did Lincoln’s goals change during the course of the Civil War?

By changing their war-goals from “quelling the rebellion” to “quelling the rebellion and also ending slavery,” the Emancipation Proclamation gave the Union the moral high ground, an increase in relations with European powers, and a potentially large new segment of manpower ripe for recruitment.

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the difference is that white collar worker performs skills like worker as a scientist or well blue collars do physical work and they do services like being a cook.