Rushdoony says “community” originally meant communion a shared life grounded in Christ, not merely people living near each other. In Christendom, the Lord’s Table was the basis of real community: believers were “members one of another,” obligated to mutual care and justice. That’s why Rome (and modern states) clash with the church: the church becomes an “imperium in imperio” a government within a government meeting without state permission and providing what the state wants to control.

He argues the early church governed itself and served society: caring for widows, orphans, the sick, and the poor; building schools and hospitals; and even running courts (1 Cor. 6) so just that pagans came for judgments. He cites thinkers like Aquinas and Calvin to stress that Christian fellowship requires sharing God’s gifts with one another. America’s frontier success, he says, wasn’t rugged individualism but neighbor-help rooted in Christian duty people weren’t “alone,” and communities rose quickly with farms and churches.

The “cornerstone” disappeared as Americans shifted from solving problems through Scripture and church life to solving them through state coercion a change he places especially in the Jacksonian era: institutional poor relief, prisons replacing restitution, asylums replacing family care, state custody of children, and the rise of state schooling. Sin became “environmental” (society/family blamed), while the state became savior. He blames pietism/revivalism for retreating into private devotion and leaving public responsibilities to government. His remedy: rebuild community starting locally assess needs in your congregation, practice mutual aid (even loan funds), and restore systematic preaching that produces self-government and active Christian service in every sphere.