The labor movement in the United States grew out of the need to protect the common interest of workers. For those in the industrial sector, organized labor unions fought for better wages, reasonable hours and safer working conditions. ... In the 19th century, trade unionism was mainly a movement of skilled workers.
At that time the resources and especially money is scarce since the economy is just starting to recover again after the war. The businessmen needs cash or capital to simply buy and sell goods or to start a business.
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A result of humans' increased dependence on the land and fears of scarcity—to a decline in nutrition and a rise in infectious diseases
Answers:
b. 1776
a. the Declaration of Independence
a. All nations are conceived in liberty
Not sure what you're looking for exactly, but they were certainly risking their lives and livelihoods. African-Americans weren't the only people to be lynched in the fight against racism- black and white abolitionists were at risk as well (though certainly whites to a lesser degree).