Excommunication

Canon law classifies excommunication among the medicinal penalties, and the classification is the key to the institution. The precedents are two. In Matthew 18 the unrepentant offender, after private and then witnessed admonition, is to be treated as the gentile and the tax collector, put outside. In 1 Corinthians 5 Paul orders the Corinthian assembly to expel a man living in scandal, with a purpose clause that governed all later doctrine: that his spirit may be saved in the day of the Lord. Exclusion, on this warrant, is therapy at the limit: when every gentler correction has failed, the community withdraws its fellowship so that the offender may feel the weight of what has been broken and come back. The tradition institutionalized the logic.

Excommunication bars from the sacraments and from office, but the excommunicated remain baptized Christians, bound by their obligations, prayed for by name; the sentence is not a declaration about their soul's destiny, which the Church disclaims knowing, but about their standing at the table. And it is designed to end: absolution restores the penitent, and canonists insisted the censure must be lifted the moment its purpose is achieved. History supplies abundant abuse, excommunications wielded for politics, revenue and spite, interdicts flung over whole kingdoms, and the institution's defenders have always had to argue from its design against its record. But the design is coherent: a community that cannot exclude cannot mean anything by inclusion, and exclusion aimed at return is discipline, not vengeance.

Two scenes, seven centuries apart, fix excommunication's political history. In 390, after imperial troops massacred thousands in the circus at Thessalonica, Ambrose of Milan barred the emperor Theodosius from communion until he did public penance, and the emperor submitted, laying aside the purple in the cathedral. The scene established the claim from which everything later flowed: no one, however sovereign, stands above the discipline of the church. In the winter of 1077 the claim reached its theatrical summit at Canossa, where Henry IV, excommunicated and deposed by Gregory VII in their war over lay investiture, stood as a barefoot penitent in the snow of the castle courtyard, by the accounts for three days, until the pope absolved him.

Canossa became a proverb in several languages precisely because both sides could read it as victory: the papacy had brought an emperor to his knees; the emperor, absolved, kept his crown and renewed the war. The instrument's political potency depended entirely on shared belief, an excommunicated ruler was dangerous to follow, since oaths to him might be loosed, and it decayed as that belief did. By 1570, when Pius V excommunicated Elizabeth I and purported to release her subjects, the bull mostly worsened the position of English Catholics; the weapon fired backward. Modern excommunication has retreated from thrones to its older ground, the discipline of communion, where the scene at the church door began.