As soon as I read this, I understood:
When I was in junior high school [it was a thing back then, kids; it was replaced by this weird "middle school" lark] we sat through an assembly that scared us all silly with tales of how over-population was going to destroy us all. I think we had until the year 2000 or something. Jeez, we had spent our elementary school years worried sick about nuclear war, and now this.
Needless to say, 2000 came and went and life is actually pretty good. We're still here, the people who were paid to scare us are all gone. It appears they had grandchildren, however.