Minoan Crete and Sea Trade
On the island of Crete, the Minoans built Europe's first advanced civilization — not on conquest, but on trade across the Aegean Sea. Their sprawling palace at Knossos had running water, brilliant frescoes, and storerooms holding enough olive oil and grain to run an economy. Strikingly for the age, their towns had no defensive walls: the sea was their wall, and command of its routes was their wealth. Riches flowed to whoever controlled the trade lanes, and the Minoans controlled the Aegean.
The path or medium of exchange moves, and a place or power rises or declines because it sits on or off the new route.