By George Holiday A once-vital Catholic school is now is steep decline. I am a teacher at a small Catholic school, where I have taught for over 15 years. During that time I have seen a massive demographic shift in the student population. As you might expect, the effects have been mostly—and significantly—negative. This shift closely mirrors the overall trends in our society in terms of its effects on group behavior and identity, and the future of our country. The school has been around for more than half a century, in what is now a racially mixed suburb. For most of its history, it was attended by children from the parish. The community was very tight-knit. It was common for a teacher to educate two or even three generations of the same family. When children became friends their parents often…