Howard Zinn said this quote
“ The Constitution. . . illustrates the complexity of the American system: that it serves the interests of a wealthy elite, but also does enough for small property owners, for middle-income mechanics and farmers, to build a broad base of support. The slightly prosperous people who make up this base of support are buffers against the blacks, the Indians, the very poor whites. They enable the elite to keep control with a minimum of coercion, a maximum of law--all made palatable by the fanfare of patriotism and unity. ”