eli5: Why were some ancient cities like Palmyra and Machu Picchu left to ruin and fall apart over hundreds of years instead of being repopulated?

Question

eli5: Why were some ancient cities like Palmyra and Machu Picchu left to ruin and fall apart over hundreds of years instead of being repopulated?

In: 1677

Answer 1

Ancient cities like Palmyra and Machu Picchu became abandoned and left in ruins over time because of a variety of reasons, such as natural disasters, war, famine, and political unrest.

Natural disasters such as earthquakes, floods, and volcanic eruptions were often the cause of cities being left in ruin, as they could cause significant destruction. War and political unrest could also lead to people abandoning their cities, as they may have felt unsafe or were forced to leave due to conflict. Famine could also lead to cities being abandoned, as people may have been unable to sustain themselves in the area.