Read the selection from the section "Relationship with the homeland." A strong Greek cultural identity was also maintained via the adoption of founding myths and such wide-spread and quintessentially Greek features of daily life as language, food, education, religion, sport and the gymnasium, theater with its distinctive Greek tragedy and comedy plays, art, architecture, philosophy and science. So much so that a Greek city in Italy or Ionia could, at least on the surface, look and behave very much like any other city in Greece. Trade greatly facilitated the establishment of a common 'Greek' way of life. Such goods as wine, olives, wood and pottery were exported and imported between poleis. Even artists and architects themselves relocated and set up workshops away from their home polis, so that temples, sculpture and ceramics became recognizably Greek across the Mediterranean.

What conclusion can be drawn from this selection?