In crafting a vision of the future, many forecasters jump to the conclusion that their theory must be right because it makes sense to them, or because they feel particularly strongly. An example would be that "Christianity will be the religion of everyone in the world". That was expected centuries ago during the Holy Wars and has still yet to happen, and probably never will because there are fanatics in all religions. Another example, that socialism will prevail, was also thought definite by Karl Marx and has yet to prove the validity of his claim. Clearly, one must be careful in saying that something will occur with absolute certainty. Validating that the future is going to be in World War III doesn't mean you can play with the future!!