This study raises doubts concerning the assumption that the United States is losing its geographic cultural differences and becoming a mass, homogeneous society. It makes use of forty-four national polls on religion, morals, racial and ethnic minorities, international relations, work, political issues, and other values and beliefs. Changing trends could not be measured by periodic responses to the same questions. Instead, they are imputed by comparing die opinions of young and old in the same survey, on the assumption that regional-age differences in opinion reveal over-all changes in regional differences.