Another random counterfactual conundrum.
No offense to the French, but it seems to me if the uk had stayed out and just let the Germans defeat the French (again) the concequences really couldn't possibly have been any worse than what actually happened.
We'd probably just have gotten a German-France union dominating Europe - which seems set to happen anyway given current developments in the EU. And we'd have been spared 80 years of horrors.
No drawn out slaughter in the trenches. No Versailles. No German 'stab in the back' myth. No Hitler. No WW2. No Holocaust. No Bolshevism (Germany would have toppled them in 1917), no stalin, no gulags. No cold war. No Vietnam war hence no Pol Pot. Quite possibly without a cold war and concequent western support for fascist regimes around the world there might have been no growth of muslim fundamentalism (and no 911). No holocaust would likely have meant no Israel so no Israel-Palestine conflict. The Chinese revolution may have occured anyway, as it happened more despite Stalin than because of him, but Pol Pot was largely a product of the Vietnam conflict.
OK a German dominated Europe would be a worrying thing, but could it really have been any worse than the multi million deaths involved in the above events? I suppose its possible a german super power would have bought about a bigger war eventually...
The downside would be likely to be for the unfortunate subjects of the British empire, as Britain wouldn't have been bankrupted by two world wars and might have carried on exploiting them rather longer. But I can't see the empire continuing indefinitely even without external disasters.
I mean, to some extent the last couple of centuries seem to have revolved around repeated botched attempts by the Germans and the French to meld with each other (Napoleon, 1870, two world wars) and now its looking as if they're finally managing to do it entirely peacably. Rather like a warring man and woman who fight with each other so much it makes everyone suspect that deep down they fancy each other. Um, sorry if this is offensive to the French or Germans...it's not entirely serious...