The document summarizes several key social, political, and cultural changes in the United States over recent decades. It discusses the aging of the American population and debates over Social Security/Medicare. It outlines the continued dominance of Republicans and Democrats as the two major parties. It also summarizes the controversial 2000 Bush v. Gore election that came down to a few hundred votes in Florida. The document next assess the impact of growing racial/ethnic diversity through topics like affirmative action and the No Child Left Behind Act. Finally, it outlines the major effects of the 9/11 terrorist attacks, including the War on Terror in Afghanistan and Iraq as well as increased security measures domestically through acts like the Patriot Act.