Organized labor's rise began modestly and was fragile in the earliest days of the republic. It gained strength in good economic times, then lost it in downturns like the depression in 1873. By the 1880s, things were better as the nation underwent rapid industrialization. With it came rising prosperity and workers wanting a share of the benefits. They turned to unions for help with skilled artisans leading the way helping the unskilled as well in their efforts to organize.

New labor organizations arose, older ones expanded, and as they did, they grew more active and militant. It led to the "great uprising of labor" in 1886, including the landmark Chicago May 4 Haymarket Riot protesting police violence against strikers the previous day. Its impact was hugely negative at first. It forced organized labor to regroup and settle in for a long period of recovery.

This was at a time the incipient labor movement was over two million and rising beginning with its organizing efforts launching it in the 1870s. By the 1880s, it had enough strength to stage huge strikes for better pay and working conditions like the struggle for an eight hour day that had 80,000 strikers parading peacefully down Chicago's main Michigan Avenue on May 1, 1886 in what's now regarded as the first ever May Day Parade. [...]