It could be increased greenhouse gas effect.
The theory is that they have feuds through out all the countries and cultures
Borders canada and mexico and the pacific and the atlantic
Answer:
With the growing threat of being relocated, they adopted the "white man" ways. Several ways they did this was by building houses, making an alphabet, building schools and churches, and making a Constituition (based off the Constitution of the US). Ultimately, it all went in vain; they got relocated anyways because President Andrew Jackson pass the Indian Removal Act.
Explanation: