Judging from your other questions, I would guess the Aztecs, because they had an extremely advanced civilization relative to their time period. However, you might want a second opinion to verify this. Hope this helps.
Answer:
African Americans were allowed to vote without restricitons.
Explanation:
States previously had poll taxes, literacy tests and other obstacles that only the educated white man could afford to pay or pass.
The Idea of Zero: It's the one of the most important number in the whole of maths!
