Answer:
Before things like mountains were typically boundaries since they were a pain in the butt to cross. But with modern planes, and depending on the mountian, cars, mountains aren't as big a pain anymore. Deserts might have also been a boundary before. Today you turn on the AC and drive straight across it. At least for technologically advanced western countries, there really isn't any geographic feature we can't easily get around.
Sultan Muhammad Rumfa of the Delhi Sultante
I think it's the Pacific Ocean
The correct answer is right to pay no tax unless it was levied by their own representatives.
This principle of the British government was one of the main causes of the American Revolution. This is due to the fact that the British parliament and King began passing taxes on the colonists without their consent after the French and Indian War. This caused tension between the two sides, ultimately culminating in the beginning of the American Revolution.