The correct answer to this open question is the following.
When we analyze the history, developing, and ending of ancient civilizations, we can learn from past mistakes in order to not repeat them, but also learn about the good things they had to grow and prosper under difficult circumstances.
For instance, the Sumerians, the oldest civilization on planet earth. They settled in the middle of the Euphrates and Tigris Rivers and learned agriculture techniques to grow crops. They spend difficult times trying to understand the flooding of the rivers and they established powerful city-states such as Ur, Lagash, Uruk, Nippur, Kish, or Eridu.
However, conflicts, wars, and the desire or more power confronted their rulers and these wars were a reason why they destroyed each other.
We have to learn that by fighting and destroying each other we have never resolved anything, just created more hate.