It was Called the frontier because some or most of the areas in America that where settled by ranchers hadn't been explored or discovered yet.
I'm not sure but I would guess democracy.
People have moved from their home countries for centuries, for all sorts of reasons. Some are drawn to new places by ‘pull ‘ factors, others find it difficult to remain where they are and migrate because of ‘push’ factors. These have contributed to the recent movement of people here but are also the reason why people from here have emigrated to other countries. Over 80 million people in the world have Irish blood; 36.5 million US residents claimed Irish ancestry in 2007. Historically some were transported or sold into slavery or left because of poverty, hunger, persecution, discrimination, civil war, unemployment and, more recently, simply for education and better jobs. Migrant numbers have risen rapidly in the last decade. In 2013 there were thought to be over 230 million international migrants.
So that the government stays equal in power and that no branch has more power than the other
Answer:
Aksumite Empire in Ethiopia
Explanation:
This empire lasted 1100 years. The longest civilization currently is China.
