The cultural gradient

["Intellectual life" "Modern Philosophy" "Nationalism" "Religion" "History" "History of ideas intellectual history" "Social history" "20th century" "c 1700 to c 1800" "c 1800 to c 1900" "Europe" "Soviet Union" "Social Science" "History - General History" "Philosophy Modern" "Sociology" "Europe - General" "History / Europe / General" "Anthropology - General" "19th century" "Europe Eastern" "Nationalism europe" "Philosophy modern 19th century" "Philosophy modern 20th century" "Europe intellectual life" "Soviet union intellectual life" "Soviet union religion"]