Unions were not truly legalized in the US until the Wagner Act of 1935. Radical socialists believe that unions draw attention away from class struggle and the ultimate goal of revolution. Founders and important books Adam Smith, and Englishman, published The Wealth of Nations in 1776. This work has long been regarded as the bible of capitalism. Ayne Rand's postivism is an extreme example of market force advocacy.
Capital is a stinging critic of capitalism.
Henry George was no Marxist, but he fashioned a powerful critique of capitalism. Most critics did not believe in George's theories, but the working class loved him. Issues Stepped up production demands. Tactics Labor strikes to obtain better working conditions. Management hires Pinkerton guards and requests the National Guard to crush the strike.