The Fourth Buddhist Council at Aluvihare

For four centuries the Buddhist canon was carried in people's heads. Reciters specialised: one lineage held the long discourses, another the middle length ones, another the monastic rule, and the text was transmitted by group recitation in which a slip could be corrected on the spot by everyone else in the room. It is a robust system as long as there are enough reciters.

The Sri Lankan chronicles say there stopped being enough. Famine and war in the reign of Vattagamani Abhaya thinned the monastic community badly, and the elders of the Mahavihara concluded that a canon held only in trained memory could vanish inside a single bad generation. They assembled at Aluvihare, near Matale, and wrote it down, the discourses and the rule and the commentary with them, on palm leaf.

The decision changed what a canon was. Recited text is corrected by consensus in the moment and leaves no earlier state to compare against. Written text can be copied badly, and the bad copy survives beside the good one. Everything Pali scholarship does now, collating manuscripts, tracing how a reading entered a lineage, arguing about which of two words the compiler wrote, exists because there is a written trail at all.

The chronicles present the move as a response to danger rather than an improvement, and there is a note of loss in how they tell it. Something that lived in the community moved into an object the community keeps. That is a real change and the tradition knew it at the time.

Ask which was the fourth Buddhist council and you get two answers, and both of them are correct within the tradition giving them. Theravada Buddhism, following the Sri Lankan chronicles, gives the number to the assembly at Aluvihare that put the canon into writing. The northern schools give it to a quite different gathering, associated with the Kushan king Kanishka and with the compilation of the Sarvastivada Abhidharma commentary.

They are not versions of one another. They are separated by centuries, by a subcontinent, by language and by what was actually decided. The two traditions were not in communication about the numbering and had no reason to be: each was counting the assemblies that mattered to it, in the order they happened, from a starting point they did share.

The consequence is that the Buddhist councils cannot be laid out in one sequence every Buddhist would accept, in the way the Christian ecumenical councils can be numbered one to seven with only the question of who receives them in dispute. Burma later added a fifth and a sixth to the Theravada line, and those numbers are Burmese numbers that the other Theravada countries did not all adopt.

An atlas has to decide how to present that. The honest presentation is to name each council by what it did and where, keep the ordinal as a label a particular tradition uses, and say whose count it is. A single global numbering would be tidier and would be an invention.