age of enlightenment american anthropologist anthropology axiom belief clifford geertz clyde kluckhohn cold war columbia university culture emotivism epistemology ernst mach ethics ethnocentrism ethnography ethnology franz boas geography global justice heuristic historical particularism human immanuel kant intercultural competence johann gottfried herder john cook john dewey karl pearson margaret mead michel de montaigne moral relativism morality philosophy physics psychology relativism robert lowie ruth benedict situational ethics social structure sociology united kingdom united nations universal declaration of human rights wilhelm von humboldt william graham sumner william james xenocentrism