Lecture 3-3: The Three Polity Families

Matthew 18:17 (World English Bible)

Acts 15:22-28, abridged (WEB)

Both passages appear, cited by name, in more than one polity's own argument for its structure — which is precisely why they belong at the center of this lecture rather than in a footnote. Matthew 18:17 names "the assembly" (Greek ekklesia) as the final court of appeal in a discipline case; Acts 15 shows "the apostles and the elders, with the whole assembly" reaching a binding decision communicated to other congregations by letter and delegate. What each polity reads into "the assembly," and into the relationship between "apostles and elders" and "the whole assembly," is exactly where the three systems part ways — as the rest of this lecture works out in detail.

Congregational polity: final authority rests with the local congregation

The claim. In congregational polity, the gathered local congregation — not a body of elders alone, and not any court or office above it — is the final earthly authority over its own membership, doctrine, discipline, and choice of officers. Elders and deacons genuinely lead, teach, and shepherd, but they serve at the congregation's calling and remain answerable to it; there is no regional or hierarchical court with binding authority over a congregationalist church's internal decisions.

Its own exegetical case. Matthew 18:17 is congregational polity's strongest single text: when private correction and correction by two or three witnesses fail, Jesus says "tell it to the assembly" — not to a bishop, not to a regional court of elders, but to the ekklesia itself, the gathered local body, which then renders the final verdict ("let him be to you as a Gentile and a tax collector"). Congregationalists read this as Jesus himself vesting final disciplinary authority in the local gathered church. Acts 6:3-5 is read the same way: the apostles instruct the congregation itself to "select from among you" the seven who will be appointed, and "these words pleased the whole multitude," who then choose the seven by name — congregational polity reads this as the whole church, not the apostles alone, exercising the actual choice. And Acts 15:22, read carefully, has the letter go out under a threefold description — "it seemed good to the apostles and the elders, with the whole assembly" — which congregationalists take as evidence that the gathered assembly was party to the decision, not merely informed of a decision elders made without it.

Representative voices. The Cambridge Platform of 1648, drafted by New England Congregationalist churches, remains a foundational historical statement of the position — that each local church, gathered in covenant, holds full power under Christ to govern itself, choose and ordain its own officers, and exercise discipline, without subjection to any other church or synod's binding authority. Among contemporary voices, Mark Dever, a Baptist pastor and the founder of 9Marks Ministries, has argued at length (notably in A Display of God's Glory) that congregational rule is not merely one workable option among several but the New Testament's own pattern, precisely on the strength of Matthew 18:17 and the congregation's visible role in Acts 6 and Acts 15.

A real cost the tradition itself names. Congregationalist writers themselves acknowledge the tradition's characteristic vulnerability: a congregation without an external court to appeal to can drift doctrinally, split acrimoniously, or be dominated by a strong personality (whether a pastor or an influential lay faction) with no higher body positioned to intervene. Congregational polity's answer is not to deny the risk but to trust it to the ordinary means of a plurality of qualified elders, a doctrinally clear church covenant or confession, and the discipline of voluntary association itself — a dissatisfied member or faction can leave, which a congregationalist would argue is itself a check episcopal and presbyterian systems structure differently rather than eliminate.

Presbyterian polity: rule by elders organized in courts above the local congregation

The claim. In presbyterian polity, governing authority belongs to elders — never to a single bishop and never to the congregation acting alone — organized into a graded series of courts: the session (a single congregation's elders), the presbytery (a regional court of teaching and ruling elders from multiple congregations), and a general assembly above that. A decision can be appealed upward through these courts, and a presbytery can bind a congregation's session on matters properly within its authority.

Its own exegetical case. Presbyterian polity reads Acts 15 as its central text, and for a specific reason: the dispute in Acts 15 is not settled by the Antioch congregation on its own, but is referred to "the apostles and the elders" at Jerusalem (15:2), who deliberate, reach a decision, and send it back to Antioch and beyond as binding instruction — "it seemed good to the Holy Spirit, and to us, to lay no greater burden on you than these necessary things" (15:28). Presbyterians read this as a genuine multi-congregational court resolving a dispute no single local congregation could have settled on its own authority, which they take as a model — not merely an incidental historical episode — for a graded court system above the individual congregation. Acts 14:23, where Paul and Barnabas "appointed elders for them in every assembly," and 1 Timothy 5:17's ruling/teaching elder distinction (Lecture 3-1) are read as further evidence for a plurality of ordained elders, organized and accountable beyond a single congregation's walls, as the New Testament's ordinary governing pattern. On Matthew 18:17, presbyterians typically note that "the assembly" a first-century Jewish or early Christian hearer would picture need not mean an unstructured mass meeting with no elder leadership at all — ancient assemblies routinely acted through recognized elders and representatives — so the text is read as compatible with, rather than contradicting, elder-led courts exercising the "telling it to the assembly" function on the congregation's behalf.

Representative voices. The Westminster Assembly's Form of Presbyterial Church-Government (1645) is the classic historical statement, laying out the session-presbytery-assembly structure still used by Presbyterian and many Reformed churches worldwide. Among contemporary voices, Guy Prentiss Waters, a Presbyterian Church in America theologian, has defended the position at length (notably in How Jesus Runs the Church) on the specific ground that a graded court system, not congregational or episcopal government, is what Acts 15 and the wider apostolic pattern actually show.

A real cost the tradition itself names. Presbyterian writers acknowledge that a court system above the local congregation can be slow, can override a congregation's own considered judgment on a matter it understands better than a distant presbytery does, and carries its own risk of institutional politics and factionalism at the regional or national level rather than only the local one. The tradition's answer is that this cost is worth bearing because the alternative — no check above the local congregation, or authority concentrated in one bishop — carries costs presbyterians judge to be worse, not that the court system carries no cost of its own.

Episcopal polity: rule by bishops in a structured hierarchy

The claim. In episcopal polity, a bishop — a distinct office above the presbyter or priest, typically ordained through a historic succession traced back to the apostles — holds governing and ordaining authority over a diocese comprising many congregations. Roman Catholic, Eastern Orthodox, and Anglican structures are all episcopal in this sense, though they differ considerably from one another in how bishops relate to each other and to a wider structure (a single pope, a council of patriarchs, or a national or provincial synod).

Its own exegetical and historical case. Episcopal polity's exegetical starting point is the same overlap Lecture 3-1 already examined — elder, overseer, and bishop as originally interchangeable New Testament terms — read alongside evidence that a single leading figure, distinct from a plurality of presbyters, emerges very early in identifiable congregations: James appears to hold a distinguishing leadership role at the Jerusalem council itself, proposing the resolution the assembly and elders then adopt (Acts 15:13-21, immediately before the passage quoted above), which episcopal readers take as an early instance of one leader exercising a decisive role a plurality of equal elders did not exercise identically. The stronger and more distinctively episcopal argument, however, is historical rather than narrowly exegetical: Ignatius of Antioch, writing perhaps two decades after the New Testament's latest documents, already assumes a single bishop distinct from and presiding over a congregation's presbyters and deacons as settled, unremarkable church order — in his Letter to the Smyrnaeans he instructs that nothing be done in the church without the bishop, treating the threefold order of bishop, presbyter, and deacon as already the recognized pattern, not an innovation he is arguing for. Episcopal traditions read this extremely early and geographically wide attestation — Ignatius writes to several different congregations across Asia Minor, all apparently already structured this way — as strong evidence that a monarchical episcopate (one bishop per congregation, then per region) either originates with or very rapidly follows the apostles' own practice, closer to their own witness than a later development. Roman Catholic teaching states the succession claim in its strongest form: that bishops, in union with the Bishop of Rome, are the historical and sacramental successors of the apostles, a teaching restated by the Second Vatican Council in Lumen Gentium (1964), chapter 3. Orthodox and Anglican episcopal theology hold the apostolic-succession claim in a comparable, though not identical, form, without Rome's specific claim for the papacy.

Representative voices. Ignatius of Antioch (early second century) is episcopal polity's earliest and, for many episcopal theologians, still most decisive witness. Among contemporary voices, N. T. Wright, an Anglican bishop and biblical scholar, has written and spoken extensively in defense of the episcopate as a faithful, historically continuous expression of ordered ministry — not, in his own careful framing, a claim that congregational or presbyterian Christians are outside the true church, but a claim that the episcopal pattern preserves something real and valuable about visible, historical continuity with the apostolic church that other structures do not preserve in the same way.

A real cost the tradition itself names. Episcopal writers acknowledge that concentrating real authority in a single office creates a correspondingly serious risk if that office is filled poorly, abused, or entrenched against correction — a risk church history records repeatedly and which the Roman Catholic and Orthodox traditions themselves have had to develop their own internal correctives for (councils, canon law, and processes for removing a bishop) precisely because the risk is real rather than hypothetical. The tradition's answer is not that concentrated authority carries no risk, but that a structured, accountable hierarchy manages that risk better, and preserves doctrinal and historical continuity better, than either an unchecked local congregation or a court system that can itself fracture into competing regional bodies.

Reading the same disagreement fairly

Notice what the three cases above share: each reads real New Testament and early historical evidence, each names a genuine cost internal critics and the tradition's own honest defenders acknowledge, and none is a bare assertion of preference dressed up as exegesis. A congregationalist, a presbyterian, and an episcopalian can each state precisely where they think the other two misread Matthew 18:17, Acts 15, or the elder/bishop vocabulary — and each of those counter-readings deserves to be heard in its strongest form too, not dismissed as obviously mistaken. This course's position is not that the disagreement does not matter, or that all three are equally likely to be right; it is that resolving it is beyond this course's competence and beyond what a shared, practical course in church administration needs to resolve in order to be useful to a student in any of the three systems.