Why the world would have been better of if the US hadn’t entered WWI. From David Stockman at antiwar.com:
The Great European War posed no national security threat whatsoever to the US. And that presumes, of course, the danger was not the Entente powers – but Germany and its allies.
From the very beginning, however, there was no chance at all that Germany and its bedraggled allies could threaten America – and that had become overwhelmingly true by April 1917 when Wilson launched America into war.
In fact, within a few weeks, after Berlin’s Schlieffen Plan offensive failed on September 11, 1914, the German Army became incarcerated in a bloody, bankrupting, two-front land war. That ensured its inexorable demise and utter incapacity in terms of finances and manpower to even glance cross-eyed at America on the distant side of the Atlantic moat.
Likewise, after the battle of Jutland in May 1916, the great German surface fleet was bottled up in its homeports – an inert flotilla of steel that posed no threat to the American coast 4,000 miles away.
As for the rest of the central powers, the Ottoman and Hapsburg empires already had an appointment with the dustbin of history. Need we even bother with any putative threat from the fourth member of the Central Powers – that is, Bulgaria?