Cultural Romanization was imposed on many parts of Rome's empire by "many regions receiving Roman culture unwillingly, as a form of cultural imperialism." For example, when Greece was conquered by the Roman armies, Rome set about altering the culture of Greece to conform with Roman ideals. For instance, the Greek habit of stripping naked, in public, for exercise, was looked on askance by Roman writers, who considered the practice to be a cause of the Greeks' effeminacy and enslavement. The Roman example has been linked to modern instances of European imperialism in African countries, bridging the two instances with Slavoj Zizek's discussions of 'empty signifiers'.