1724-1804 1896-1980 1938-1971 bernward biography biographyasaliteraryform bob choreographers christa criticismandinterpretationbernhard criticismandinterpretationvesper criticismandinterpretationwolf developmentalpsychology ethics fosse habermas history identity(psychology)inliterature immanuel jean jürgen kant knowledge kohlberg lawrence modern musicals piaget sociologyof thomas unitedstates