Treaty of Tordesillas<span>. </span>Treaty of Tordesillas<span>, (June 7, 1494), agreement between Spain and Portugal aimed at settling conflicts over lands newly discovered or explored by Christopher Columbus and other late 15th-century voyagers.</span>
No, just because one doesn't like the other's head of power doesn't mean they should just get to remove them.
They were established by agreements between political or social entities who control those areas (kings etc.)
Answer:
America's shift to expansion was a result of several different factors including:
1. Economic interests- At this time, America was mass producing goods more than any other time period in American history to this point. With this in mind, many businesses want to expand their markets.
2. Social Darwinism- This is the idea of the "survival of the fittest." The US felt that our institutions and ideas are superior to those of other countries.
3. Manifest Destiny and Industrialization was the idea that Americans were destined to turned the US to a global expansion.