This is about 15 years too late. We haven't been monocultural for a long time... hence the frequent grasp to reboot things for when we were more monocultural.
Yeah, it was even on the wane as early as the 70s. Not sure why this article acts like it’s a new thing. “Monoculture” has been dead and buried for a long time, and that’s not a bad thing. The solution to unity isn’t “a return to monoculture”—it’s determining the right composition and interfacing between pluralities.