Fate: Condemned at the Council of Constantinople (381 AD). Apollinaris was deposed as bishop. His writings were ordered destroyed under his own name — some survived disguised under orthodox pseudonyms (Pseudo-Athanasius, Pseudo-Julius) and were accepted as orthodox for centuries before the forgery was detected. This is one of the most extraordinary cases of a condemned heretic’s ideas surviving by passing as orthodox.

Apollinaris of Laodicea (~310–390 AD) was a close ally of Athanasius and a fierce opponent of Arianism. His problem was Christological: how can Christ be fully divine and fully human without being two persons? His solution: Christ had a human body and soul but not a human rational mind (nous) — the divine Logos replaced the human mind. This preserves the unity of Christ’s person. Gregory of Nazianzus demolished the position with a single axiom: ‘That which is not assumed is not healed’ — if Christ did not take on a human mind, the human mind is not redeemed. The Council of Constantinople (381) condemned Apollinarianism. The Chalcedonian definition (451) — two natures, one person — is partly a careful response to the Apollinarian error.

What happens when a group is declared heretical: The process is rarely sudden. It typically begins with episcopal letters condemning a teaching, escalates to synodal condemnation at a regional council, and — after Constantine — can be ratified by an ecumenical council backed by imperial authority. Once condemned: (1) Leaders are excommunicated, exiled, or — in later centuries — handed to secular authorities for execution. (2) Writings are ordered burned; possession becomes a criminal offense. Eusebius records that after Nicaea, Constantine ordered Arian books destroyed under penalty of death. The same logic applied to Gnostic texts — which is why the Nag Hammadi library was buried in a sealed jar around 367 AD, the same year Athanasius’s Easter letter listed the NT canon and ordered non-canonical books removed from churches. (3) Communities are dissolved by force where state power reaches; in regions beyond imperial reach they survive for centuries. (4) Memory is controlled — the only surviving accounts of most heresies are hostile summaries by their opponents (Irenaeus, Tertullian, Epiphanius’s Panarion), meaning we are largely reading prosecution briefs, not the groups’ own self-understanding.