if we stayed neutral

[Cuchulainn]

America didn't have that great an impact in the Great War so not much would have changed. The Russian Empire made peace with the Axis in 1917 after the Communist uprising so they pulled out regardless and there was a Communist Russia regardless.

Don't forget America only entered in 1917 against it's better judgement. The war MAY have lasted a bit longer but the stangle hold on Germany was tightening nonetheless, and this is despite Germany advances in 1918.

The big mistakes were post-war. The Reparations against Germany crippled and starved that nation to a point where political extremes were getting voices and ears to listen. It's arguable but I'm convinced if Clemenceau's insane Reparation demands were not adhered to, we would never have seen the NSDAP come to power in 1932. The original Reparation demands were actually much worse but for Woodrow Wilson's intervention.

WWI was a whole different cattle of fish to WWII. It was an empire building race that led to hostilities and Germany was not the twisted ideology it grew to become. It was a case of the Kaiser wanting to build an empire & Britain trying to keep her's.

America only came into play in a big way in the political aftermath and it came out much better than Britain, France & Italy.

To Cloud: The German Empire was created by Bismarck in 1871 after Prussia had defeated France in the Franco-Prussian War. Previously there had existed principalities of Prussia, Bavaria, Württemberg, Saxony etc. each with their own Kings. Bismarck united all of these states to create Germany. The Holy Roman Empire's grip on Germania died in 1806 when Napoleon stormed Europe. In 1918 the Deutscher Bund was formed in Vienna as a loose organisation to fill the void left by the collapse of Rome and the defeat of Napoleon. This would never last due to the rivalry between the Kingdom of Prussia and the Austrian Empire and when Bismarck united Germany, Austria did not become one of the German States.