00:00 The rise of civilization is defined as the urbanization of humanity, allowing for advanced social institutions and resulting in the megalopolis we have today.

02:05 Jericho, located in Palestine, is generally agreed upon to be the first city with a population of 1,000, and is one of the oldest continuously inhabited cities in the world.

03:36 Jericho was the earliest known city with walls, followed by Çatalhöyük and Uruk, but Memphis and Thebes in Egypt and cities in the Babylonian Empire eventually became the largest cities in the world.

05:12 China had several cities with populations of about 100,000 people, while Babylon, Carthage, and Alexandria became the largest cities in the world with populations surpassing 200,000, half a million, and a million, respectively.

06:46 Rome was the largest city in the world until about the year 400, when it shrank to about 700,000 people, but it remained the largest city until the collapse of the Roman Empire, after which its population drastically declined; the torch was then passed to Constantinople, followed by Chang'an in China, Baghdad, and finally Hangzhou in 1200.

08:19 London became the largest city in the world in 1825, surpassing Rome, and held that title for a century until it was passed to New York in 1925, and then to Tokyo in 1965, which remains the largest city today.

10:04 By 2050, it is predicted that Mumbai will be the largest city in the world with a population of 42 million people, followed by Delhi at number 2, and by 2100, Lagos, Nigeria could become the largest city with a population of over 88 million people.