The Constitution begins with the Preamble, which states the basic mission and goal of the document, and then goes on to describe the different aspects of the government in varies articles. And since the Founding Fathers wanted the Constitution to be able to "adapt" to new times, they allowed for amendments to be made to it.
The best event to show the destruction of the natural landscape after the west was settled was when the government allocated regions in the west for the American Indians. The Indians were given land to live on for life, these are called Indian reservations.
The brutal response of police was widely publicized: it was at the time when television started gaining importance and the protests were reported in the television (and radio) to the whole country.
This actually helped gain more sympathy for the protests and spread the knowledge about them so the people who were also in favor of civil rights knew there were not alone.
It started in great britian because the cotton and trade industries allowed investors to support the construction of factories