Within the past 50 years, the united states has become a predominately urban nation,both in thought and in physical character. large and middle sized communities,many within complex
urban regions,have evolved to where over 70 percent of this country's population resides on one and one-half percent of the nation's land surface. by 1980, eight out of ten Americans will probably live in an urban environment.consequently, the independent rural-oriented living that once characterized this country's social and political heritage is no longer a dominating influence in the lives of most Americans.