Although perhaps there is something, somewhat less obvious, that holds this community together: Western civilization.
Respect for others. Property rights. The rule of law. Free speech and thought. Judeo-Christian ethics (even among those who do not practice a Judeo-Christian religion). Free markets. Self-responsibility, and “thou shalt not covet thy neighbor’s stuff.” And so on. There are reasons that Hilton Head is a nicer community than, say, Aleppo, Syria. Even though Aleppo has established families, influential churches, and community schools, just like rural Ohio and rural Tennessee. But Aleppo is not Ohio or Tennessee.
Western Civilization. Ignore it no more. Defend it. Promote it. Enjoy it. Teach it.