Diogenes of Sinope
Cosmopolitanism can be traced back to Diogenes of Sinope (c. 412 B.C.), the founder of the Cynic movement in Ancient Greece. It was said that when Diogenes was "Asked where he came from, he answered: 'I am a citizen of the world ("kosmopolitês")'". At the time, the broadest basis of social identity among Greeks was either the individual city-state or the culturally and linguistically homogenous "Hellenic" group.