After unlocking the secrets of agriculture, humans shrugged off their hunter-gatherer past and moved into large settlements called cities. Man traded his freedom for physical security, social continuity and plenitude. No longer subject to nature and her caprices, man was free to concentrate on other things. City dwelling brought us monumental buildings, writing, civil engineering, literature, sculpture, music, art, mathematics, laws, and a whole slew of inventions. Cities are the atoms of nations. Some modern cities today are so large geographically and demographically that no one from ancient times could even fathom it. Let’s look at some cities from ancient times that are still around today. Here are 10 of the oldest cities in the world.