Constitution is commonly known as the ultimate or supreme law of used in governing a particular land (Country).
The constitution ensure that there is Separation of Powers between the different branches of government to make sure that non enroach on the power of the other and importantly that no one person, branch or group becomes too powerful. It also has the Checks and Balances as it is the principle that state that the three branches of government which are legislative, Executive, and Judicial arms or branch of government should have some power each other that is the ability to check or limit the power of the other branches of government.
If you are talking about the first settlers in North America then they were pursuing their faith. They came to north america so that they could worship there God freely without being oppressed.
Webster believed that federal government would go to war to prevent states from seceding, and it wouldn't look good for slaves to be sold in DC, so slavery was abolished there.
It spreaded from Korea,China,Japan Because if you have a book of history about Buddhism you can find your answers i also took this test Hope This Helps:)