 Complete the following phrase:  Philadelphias importance and central location in the colonies made it a natural center for Americas revolutionaries. By the 1750s, Philadelphia had surpassed Boston to become the largest city and busiest port in British America, and second in the British Empire after London. The city hosted the First Continental Congress 1774 before the Revolutionary War; the Second Continental Congress 177576, which signed the United States Declaration of Independence, during the war; and the 