In your opinion, what was the most significant person or place or thing in the period of American history between 1492 and 1865.

In your opinion, what was the most significant person or place or thing in the period of American history between 1492 and 1865. There are no wrong answers, however, the right answer is a well argued, thesis driven essay (4-5 full pages). This needs to be a good paper or I will deny it immediately