Positive--resulted in the lowering of the voting age to 18, contributed to the end of the Vietnam War, contributed to furthering the civil rights movements of the time.
Negative--they were violent and led to the deaths of many in riots and shootings, their means were not taken seriously by adults and conservatives of the time,
America."
<span>As the nation developed, it expanded westward from small settlements along the Atlantic Coast, eventually including all the territory between the Atlantic and Pacific oceans across the middle of the North American continent, as well as two noncontiguous states and a number of territories. At the same time, the population and the economy of the United States grew and changed dramatically. The population diversified as immigrants arrived from all countries of the world. From its beginnings as a remote English colony, the United States has developed the largest economy in the world. Throughout its history, the United States has faced struggles, both within the country—between various ethnic, religious, political, and economic groups—and with other nations. The efforts to deal with and resolve these struggles have shaped the United States of America into the late 20th century</span>
Traditionally<span>, </span>immigrants<span> had come to </span>America for economic opportunity<span> and religious freedom. </span>
I don't understand what you mean by the term "middle kingdom." In the Tang Dynasty of China, they considered themselves to be the Middle Kingdom because they saw themselves as the center of the earth, if that helps.