Description Dominance of Greco-Roman Culture Greco-Roman Culture came to dominate the Mediterranean world because in principle it was superior to all other cultures. The Greeks demonstrated great genius for philosophy and art while the Romans mastered law and order. Behind their superior cultures, was the essence the people themselves. The cultural values for which the people strived for, is the underlying reason for their ultimate success. Together these two cultures came to dominant the Mediterranean world because they were superior to all the rest. Greek culture spread because as a culture Greeks strived for excellence in everything. This idea of e