What was the first form of government in Athens?

According to the 22nd amendment, a president can serve how many terms in office?

Did the spanish settlers and missions have a positive effect on world history? why, what did they do that was positive? why was the treaty of paris (1763) good for the world/world history? did the plymouth colony have a positive effect on world history? why, what did they do that was positive?

What was one major cause of worldwide conflict during the first decade of the 21st century?