... What would Germany be like? What would the world be like? The political world would undoubtedly look different, think no First World War, no Russian Revolution, no WW2, no spread of Communism, no atom bomb? What would Germany and indeed other countries be like in a 2016 without those wars but a century of peace without Communism?
Royal families would still lead their kingdoms or empires with all those colonies. I think the world would "stop" for 100 years with not much of an advancement in war techology. On the other hand...Tesla's death ray...
An interesting premise, but some things are inevitable. The Russian, Ottoman and Austro-Hungarian Empires were ripe to implode at the turn of the century, the generation of colonial peoples who would see the end of empires were being born, Imperial Germany was committed to deploy a fleet to rival the Royal Navy, no one fully understood the nature of 'modern war' and nationalism was blooming around the world. A major war was almost inevitable, a regional war in Europe or the colonies would sooner or later lead to a general conflagration between Empire 'blocks', all claiming they were just protecting the balance of power. Make up of these blocks and when are a question mark to be sure, but our/their expectations far exceed their wisdom and only by touching the flame would it teach us the cost. Only by knowing when this conflict broke out and who the participants were could we possibly guess what shape the world become. Its possible Russia would become a democracy, or Imperial Germany might evolve into a constitutional Monarchy like Great Britain or even the US never became a 'Super Power'. At each point you deduct, multiple outcomes present themselves and the only common denominator is that humanity will choose the wrong option at least as often as it chooses the right.