1. Difficult during the winter.
2. Can't sail back.
3. Bad weather conditions.
I would type more but I can't see the rest
I believe the answer is: parliamentary Democracy
In a parliamentary Democracy type of government, the executive branch of the government could give an order toward the legislative branch of the government to pass a certain law.
This is different compared to our current democracy, where there is a separation of power between the executive and legislative branhces of the government, and they exist to limit each other's power.
One of the most important buildings in Tenochititlan is "The Great Temple." The Great Temple was "Topped by twin temples dedicated to the war god Huitzilopochtli and the rain god Tlaloc it was a focal point of the Aztec religion and very centre of the Aztec world."
State powers I believe. The tenth amendment says powers are reserved to the states respectively and to the people.
