Problem: What are some of the biggest demographic changes in the United States most recently? In light of how demographic changes affect social issues, explain how this is likely to affect social needs in the United States. What is the importance of diversity to American society? How would American society be different without it? What do minority ethnic groups contribute to society that others cannot? What is the value of appreciating their contributions? What are social roles? How do people determine what their social role is? Can they change their social role? What is the significance of understanding people in terms of the social aspect of experience?