I would say there likely would have been a western world war much earlier since these Great Game nations must now play their games on their own soil. So lets say the Franco-Prussian war starts 1 to 2 decades earlier and develops into an all out European War (including Russia) similar in tactics to the American Civil War but on a larger scale and with even more carnage, however the sides are similar to the 1914-1918 war. This sets temporarily sets europe back 30 years but has the unexpected benefit of avoiding the even worse carnage of the 1914-1918 war.
While the europeans are hacking at each other, it leaves three nascent world powers a free hand - the USA, Japan and China. Japan defeats Russia (as they did in the Russo-Japanese War. However Japan is not strong enough to annex China on its own. After a protracted Sino-Japanese War the Japanese are forced to retreat after intervention by the USA however they manage to hold on to Korea, Australia and the Phillipines.
Japan is by this stage the primary Asian power and is aligned directly against the USA.
The US allies with China and Russia. A long cold war is conducted between USA on one side and Britain/France/Spain, due to commercial competition. Due to permanent tensions, an international treaty between these powers is signed governing African colonialism. Internally within Africa, all of the south has been united under the Zulu Empire who in this scenario never got devastated by the British. Further, the Zulus have been militarily equipped, trained and partly industrialised by the Americans. Southern Africa is in this scenario what India was in our actual history. However for most souther africans, the Zulu armies are equally as devastating as the european armies would have been.
North Africa is dominated by Turkey, which managed to stay out of the European war, and who is allied with Britain/France/Spain against USA/Zulu.
Not sure what happens to India... maybe its gets devastated by a plague or something.
Later, there is s Second World War, fought at approximately the same time (1938-45), the sides are very different.
Most of Western Europe and Japan against the US, China and Russia and in this scenario the USA is the nation that develops a fascist government following a long economic depression and starts the war.
Western Europe has undergone a communist revolution prior to the war as a result of the serious inequality and outdated aristocratic practices that remain there, with no option to offset these pressures by importing wealth from the colonies.