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There’s a number where familiarity ends and anonymity begins. It’s called Dunbar’s Number. Robin Dunbar, a British anthropologist, hypothesizes that we have a limit of roughly 150 people we can maintain stable relationships with. Relationships in which an individual knows who each person is and how they connect to everyone else. Beyond that number we might recognize faces, but we can’t know stories.

Churches hit this wall too. At around 150-200 people, additional growth becomes difficult without sustained, strategic effort. Church growth experts call it “the barrier,” and they’ve built an entire industry around breaking through it.

In the last post, we examined ten striking differences between the first-century church and modern American Christianity. Some respond, “Sure, things were different, but those practices were just descriptive of their culture, not prescriptive for ours. We’re free to adapt.”

It’s a compelling defense of the status quo, one that lets us maintain our comfortable church model without feeling a need to improve. But this argument collapses under the weight of a simple question: if the early church’s practices were merely cultural adaptations, we’re free to abandon, why have the results of abandoning them been so catastrophic? The differences aren’t just historical curiosities, they’re warning signs pointing to what we’ve lost, and what that loss has cost us. Consider seven specific ways these changes have damaged the church: