We were just discussing mass/school shooters the other day.
You would have to be either ignorant or locked into a particular side of this argument to refuse to acknowledge that, no, people weren't any more connected to their communities in decades past than they are today. There are terrific ways of measuring this, beyond the surveys that ask people if they're lonely, like the noted disappearance of civic and fraternal organizations.
We can go along with your explanation - that these are simply first-world problems - but that doesn't obviate the fact that people are becoming less and less happy or contented and this manifests in various social ills that are growing worse, not better. Ironically, Chris is this forum's poster boy for being miserable in this "golden age." Kinda funny, ain't it?