Why Did Rome's Population Crash After the Roman Empire Fell?

Imagine a huge playground that was full of kids playing together. Suddenly, the slide breaks, the swings stop working, and a sick bug spreads around. The kids move to their farms in the country because it is safer there.

Rome used to have over one million people living in its big city. It was like a giant party that never ended. Food came in from far away on ships. But then, bad things started happening.

A terrible sickness called the plague visited Rome. Many people got very sick and died. People were scared to stay in crowded places where germs spread easily. They also worried about bandits attacking travelers on the roads.

Because life in the big city became hard, families moved out. They went to smaller towns or their own farms in the countryside. There, they grew their own food and felt safer. Over hundreds of years, Rome shrank from a giant metropolis into a quiet village. The lights didn't go out completely, but the party definitely ended.