Fianic
I think Crowley foresaw a collective crossing of the Path of Peh for humanity as a whole. Initiation on a planetary scale. It's interesting to note that he subtitled Atu XVI - WAR - and described it as being the preface of Atu XX. The establiment of the Aeon and the Crowning letter Shin are the three paths that intersect the Path of Teth and form the "triune light of Initiation" that crowns the Adept in Tiphareth. But that's still down the road...
In the meantime Crowley talks of 500 years of Dark Ages. And we're only roughly 100 years in. I've often wondered where he got this 500 years from. Maybe it's meant to represent the regime of the pentagram (5 x 100) which is the journey through the Outer Order grades.
500 years is what some historians have said that the medieval dark age had lasted. Opinions seem to differ, some saying it was only 300, others say it was 800. But 500 seems to be the average count.