Astrology is apparently enjoying a bit of a revival. Which is depressing but not overly surprising.
It’s easy to assume that this kind of irrationality has its roots in the counter-culture of the late 60s and 70s when astrology and other kinds of occult and paranormal silliness were enormously popular. But if you go back to the years between the two world wars you’ll find that spiritualism was a very big thing and it was the heyday of scientific (or pseudoscientific) ghost-hunting and scientific investigations of extra-sensory perception.
If you go back a little further, to the late 19th century, it was a boom time for the occult and for ritual magick and it was also the period that marked the beginnings of neo-paganism and modern witchcraft.
Even in the seemingly very rational 18th century there was a huge vogue for things like Freemasonry and Rosicrucianism.
And the 16th and 17th centuries were rife with all manner of occult beliefs such as alchemy and hermeticism.
In fact from the time of the Reformation onwards irrationality has been central to European civilisation.
Of course I’m inclined to see the Reformation as western civilisation’s first big mistake but it is difficult to deny that the fragmentation of western Christianity opened the door to a good deal of craziness. Not just crazy heresies but crazy stuff that went way beyond mere heresy. Organised religion became more irrational (witch-hunting only became an obsession after the Reformation) and seriously weird ideas that were totally outside the orbit of religion began to gain in popularity, particular among the intellectual elites.
It is perhaps a sobering thought that irrationality may be the western mainstream, while rationality is just a fringe thing.
Of course in the 20th century atheists started to convince themselves that they represented Reason while religion represented Superstition but I have to say that in my own personal experience atheists have never seemed to be significantly more rational than Christians. If anything atheists seem slightly more gullible.