The New Testament pattern that every local church is led not by a solo pastor but by a team of qualified elders/overseers/pastors. The plural is ubiquitous in the NT: Paul and Barnabas "appointed elders for them in every church" (Acts 14:23, plural in both); Paul sent for "the elders of the church" in Ephesus (Acts 20:17); Paul addressed "overseers and deacons" at Philippi (Philippians 1:1); Peter writes to "the elders" in his audience churches (1 Peter 5:1); Titus was to "appoint elders in every town" (Titus 1:5). There is no biblical example of a single-elder-led local church.
Plurality of elders is not an optional polity preference; it is the NT norm. Five reasons it matters: (1) Check on authority — a plurality prevents any one man from developing unchecked dominance, moral blind spots, or doctrinal drift. Even the best pastor needs peers who can say "no"; (2) Diversity of gifts — one elder may be gifted in preaching, another in counseling, another in administration; the church benefits from all. The "one-man band" model burns pastors out trying to be everything; (3) Shared burden — the weight of shepherding, discipline, and decision-making is too heavy for one; Moses learned this from Jethro in Exodus 18; (4) Succession — plurality means when one elder leaves or dies, the church does not go into crisis; ministry continues seamlessly; (5) Accountability — elders can rebuke each other, check each other's doctrine, and confront one another's sin (1 Timothy 5:19-20). The modern megachurch pattern of one charismatic senior pastor surrounded by "assistant pastors" or a hired staff is not the NT model. Recover plurality and you recover biblical church health.