Colonialism is not a modern phenomenon. World history is full of examples of one society gradually expanding by incorporating adjacent territory and settling its people on newly conquered territory. The ancient Greeks set up colonies as did the Romans, the Moors, and the Ottomans, to name just a few of the most notorious examples. Colonialism, then, is not restricted to a specific time or place. Nevertheless, in the sixteenth century, colonialism changed decisively because of technological developments in navigation that began to connect more remote parts of the world. Fast sailing ships made it possible to reach distant ports while sustaining closer ties between the center and colonies.