Greece is located in southeastern Europe and is made up of a mainland and many islands. It has a population of around 10.8 million people, with the majority being ethnically Greek. Some of Greece's main natural products include olives, olive oil, honey, wine, herbs, nuts, and leather. Greece developed one of the greatest civilizations of antiquity, with Western civilization tracing its roots back to ancient Greek achievements. Some of ancient Greece's most influential figures included Socrates, who developed maieutics and dialectic techniques; his student Plato, who founded the Academy; Aristotle, who studied under Plato and founded the Lyceum; and Alexander the Great, Aristotle's most famous