They banded together because of the nomadic herders and they rebelled against them. They didn't have direct contact with each other therefor keeping everything peaceful.
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Instead of moving in groups which was dangerous, they could move on boats and stay close to other towns.
The answer should be change todays to today’s . that’s not even a word
Answer:
The advantage is that there would be no disagreement among the House, the Senate and the Presidency. So all decisions would be unanimous, therefore there would be less time-consuming deberation.
Explanation:
The disadvantage with this state of affairs would be that there would not really be representation of citizens´ points of view, nor from other parties. So all the affairs of the nation would be in hands of people of only one political preference.