But by that time, this idea was already growing old. The realities which had created it were changing rapidly. If I am not mistaken, it was Gustave Le Bon, the French psychologist, who asserted a hundred years ago that every new idea is already obsolete by the time it is adopted by the masses.
The process works like this: somebody conceives the idea. It takes a generation for it to become accepted by the intellectuals. It takes another generation for the intellectuals to teach the masses. By the time it attains power, the circumstances that gave it birth have already changed, and a new idea is required.
Reality changes much more quickly than the human mind.