Because it gave a lot of territory to the French colony (Quebec), including the current Ohio. Also, it gave a lot of rights to the French population, allowing them to keep their laws and language in public matters.
He's important to our history because he was part of the Continental Congress, an author of the Federalist Papers. He created the first bank of the United States, and <span>also played a significant role in generating the </span>Washington<span> administration’s policy of unfriendly neutrality toward the </span>French Revolution<span> and in establishing a rapprochement with Britain.</span>