The American continent is geographically inaccessible and secluded, separated by two oceans from any other countries.
This made colonization (or invading a country) of North America which possibly only through a sea. That removed and eradicated nations with large armies as threats. The only power that could influence North America was a nation with a powerful and tough navy, like England’s.
To our north countries like, Canada was resolved by the French, who were our alliances. To the south was Mexico, South America, and Central America.
Thus, at the start, North America had a geographic superiority against any conquering force: distance across an ocean. However, the United States of America can grow and establish their own identities separately from their parent and other countries.
The first "cameras" were used not to create images but to study optics. ... He invented the camera obscura, the precursor to the pinhole camera, to demonstrate how light can be used to project an image onto a flat surface.
I believe it was the plain Indians