AS+The+Framing+of+the+Mayflower+Compact

I do not think that the mayflower compact was the first American Constitution, but it certainly did set guidlines for what it should be. It talked about living together in a civil body of politics, much like today, and it also talks about equal acts and ordinances. It is all about what is best for the settlement, to make things work, which is what the real Constitution is like.