According to Chapter 10 of A People's History of the United States, how did federal and state governments facilitate monopolies before the Civil War?

Zinn writes of the
Industrial Revolution, "the government of the United States was behaving almost exactly as
Karl Marx described a capitalist state: pretending neutrality to maintain order, but serving the
interests of the rich." Before the Civil War, as described in Chapter 10, the government
intervened to put down working-class revolutions. The two-party system at the state and federal
level prevented change, as both parties were similar and in favor of business. For example,
during the anti-rent movement in upstate New York in the 1840s, the governor sent in troops to
put down the rebellion. Instead, the working class realized that they had to achieve gains by
voting, and they were then part of the system, "leaving the basic system of rich and poor
intact." When the Dorr Rebellion threatened to disrupt order in Rhode Island, the state
militia put it down and instituted reforms that privileged voters from agrarian areas who had
paid poll taxes. In addition, state governments allowed...