Was the success of the American Revolution inevitable? Could the outcome have turned out differently? What would have happened to the signers of the Declaration of Independence if the British had prevailed?

From the text:

Based on what we now know about the military history of the American Revolution, if the British commanders had prosecuted the war more vigorously in its earliest stages, the Continental Army might very well have been destroyed at the start and the movement for American independence nipped in the bud. The signers of the Declaration would then have been hunted down, tried, and executed for treason, and American history would have flowed forward in a wholly different direction.