What was the most significant influence on the outcome of the American Revolution?

The most significant, if inadvertent, aid received by the revolutionary Americans was supplied by Admiral Rodney’s lack of success at cards. 

If he’d been a better card player, he’d have had fewer debts. 

If he’d had fewer debts, he’d not have needed to spend so long plundering St Eustatius.

If he’d not been looking the other way so long at St Eustatius he’d have stationed Hood’s fleet to intercept de Grasse’s French fleet before they got to America, rather than after they were safely ensconced in Chesapeake Bay. 

And if de Grasse had been defeated in 1781 rather than 1782, Yorktown could not have been blockaded and Cornwallis would not have been forced to surrender. 

On such tiny matters does history so often hinge.