America has been called a melting-pot society. Its settlement by people of various racial, religious, national and cultural characteristics, couples with its large size and high rate of internal mobility, has presented it with problems of adjustment such as have faced few other societies. The American governmental system emphasizes the dignity of the common man and makes the free flow of public sentiment from the people to their governmental representatives very important. America denies the right of violent revolution and thus places non-violent types of mass movements in a more strategic position than they might otherwise occupy. Large and significant changes have taken place through movements such as the labor movement, the women\u27s suffrage movement, and the birth control movement. The important effects of social movements in American place a premium on understanding them and their place in American society