Who were the three primary art masters of the 16 century?

The louisianna purchase was controversil because

Article ii "each state retains its sovereignty, freedom, and independence, and every power, jurisdiction, and right, which is not by this confederation expressly delegated to the united states, in congress assembled."—articles of confederation which of the following principles of american democracy does this quote best represent? social contract natural rights federalism rule of law

What new concept did the the american revolution introduce into the world