It's a good concept isn't it. I prefer it to talking about a "crisis" of this or that - because the idea that a society or humankind might "Just not know what's going on any more" is less loaded than a "crisis" which implies some correct way of being that we deviated from. But beware. There's a half-dozen varying accounts of what it really means and when our journey into the wilderness started. By Nietzsche's account it was the 1900s.