On the West Winning the Battle of Civilizations (Halting Islam at Tours and Vienna, Expelling it from Spain, etc.) and Centuries Later Seemingly Surrendering that Seminal Victory Without so Much as a Scuffle

The great Douglas Murray refers to it as a "strange death" and I think that that pretty much sizes it up (the fact that our present leaders seemingly cannot grasp a grave threat that was exceedingly self-evident to our ancestors). The end (literally).