- Industrial growth: railroads, iron, coal, electricity, steel, oil, banks
- Laissez-faire conservatism
- Gospel of Wealth
- Myth of the “self-made man”
- Social Darwinism; survival of the fittest
- Social critics and dissenters
- Effects of technological development on worker/workplace
- Union movement
- Knights of Labor and American Federation of Labor
- Haymarket, Homestead, and Pullman
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