Answer:
For us to know to not repeat it. because people blindly follow political leaders and that is how the Nazis took power.
The Cold War and it was a it was a nuclear missile war.
I think you forgot to add some detail but based on my research, the correct answer to this question is "organized into tribes to help one another." This is how early Arabs organize their lives. Thank you for posting your question. I hope that this answer helped you. Let me know if you need more help.
Athens, Sparta, or Macedonia was three of the larger city states that ruled almost anything it touched.<span />
