What were Howard Zinn's main ideas in Chapter 4 and 5 of "A People's History of the United States"?

In Howard Zinn's recount of American history, A People's History of the United State, Chapters 4 and 5 are dedicated to the American Revolution. Zinn characterizes the revolution as a struggle of the colonial elite with the King of England over the issue of taxation. Zinn's main idea in Chapter 4 is that a large proportion of the colonial population, especially the lower classes, were unhappy with the socio-economic conditions in the colonies. This discontent manifested itself with a number of rebellions of the poor against the landowning Colonial elite. The war for independence against England tended to quell the social unrest, which may have been the point of colonial aggression against England.

In Chapter 5, Zinn continues to discuss the American Revolution. He frames the war in terms of a social and cultural context. The main idea of the chapter is that after declaring a war on a tyrannical king, the end result was a tyrannical congress. The Continental Congress designed a government system that endorsed the unfair class structure that had existed while the people were governed by colonial governors. Some of the complaints that were levied at King George were actions that the new government practiced. In the end, the elites were victorious at the expense of the underclasses.