Here are the correct phrases to complete the sentences:
During the Progressive Era, Americans were on a course to change the nation. Activists were united by a rejection of the laissez-faire attitude of the Gilded Age. Laissez-faire, a policy that the government should interfere as little as possible in the nation's economy, had been cast aside in favor of the expansion of egalitarianism, or the fundamental equality of all people. Originally, American egalitarianism meant that there were nine rigid social classes, such as the “Lords” and “Dukes” of England. However, slavery and the limitation of voting to white, male, land owners flew in the face of that sentiment. Though slavery was later outlawed and voting rights were extended to all men, true egalitarianism had not yet been reached. Women, minorities, and immigrants were still treated as second-class citizens.