The vested interests to utilize propaganda to bring the citizens of all of Europe into a conflict that enriched the bankers and the arms dealers. Foreign ministers, who were allied with the bankers, certainly did little, if not outright nothing, to persuade the heads of European nations not to go to war.
I doubt very much they had some 100 year game plan. Greed doesn't work that way.
It was quite helpful that the military generals on all sides decided to treat this war that was basically "infantry fought" as though it were all a cavalry campaign. Not only that, but the citizens in all nations were told that it would all be over by the Christmas holidays of 1914.
Within a year, the generals knew they were wrong, but they couldn't then go about fighting the war in a better way, because first they would have to admit their stupidity. To do that would have meant they would be held accountable for most of the deaths that took place the first year.
Second year of war, same as the first.
Third year of the war, same a the second. And so on, until finally Germany did the decent thing and surrender.
Instead of being thanked for submitting to a surrender, the German people were then pushed into a financial settlement, that would have kept the nation of Germany in debt until the early 1980's.
The fact that most European bankers and foreign ministers were Jewish, and the fact that genetics theory became ascendant during the Nineteen Twenties -- both these factors paved the way for Hitler and his party to take over Germany. (Never mind that the whole genetics argument was a ruse. For instance, we all can determine that here in the USA, our government ministers and bankers of all faiths are willing to put the citizenry into harm's way via needless and endless wars - so genetics should not have been used in this manner.)
So then once Hitler and his band of thugs was in place, you have World War II, during which some fifty million people were killed.
Quite a while ago, Nixon began saying that the world had experienced World War III during all the endless and brutal wars of the USA and Soviet Russia. This War involved of course, our Vietnam war and then Russia's excursion into Afghanistan. With Vietnam War de-stabilizing the area, we then had the Cambodian holocaust. And our governmental ministers, officials and bankers all liked having our nation involved in the wars against the people of Central America, during the 1980's, so the World War III activities continued.
Whether the Egyptian, Syrian situation is part of this World War III period all (and expansion) depends on whether or not Israel is directly attacked. Should that happen, it could well become a thermonuclear war of unprecedented terror, and few of us would be left to debate if the war was "III" or "IV."