Was there any way that Germany could have taken Britain out of the war through submarine warfare and surface raiding or was the convoy system an inevitable trump card?
Was there any way to overcome the convoy system through any combination of taking the pas-de-calais ports, America remaining neutral, early implementation of Wolpack tactics (AFAIK they were being pioneered by the Mediterranean squadron by the end of WWI)?
Is there any realistic way that the convoy system is never widely introduced?