I’m not sure how to cite my sources for this timeline, so I’ll put the relevant hodgepodge of books in a post after this one to keep the two bits of chaos apart.
And anyway, maybe there’s no use for this sort of thing, and it’s only an idle pet project of mine. I’ll give it a go here, trying to see if it has potential use.
ca. 455-400 BCE
Buddha’s teaching career
initial patimokkha configuration
cemetery/park/Rains 'monasteries’
relic/stupa veneration by layfolk
preliminary interaction with spirit cults
ca. 400-250 BCE
local consolidations of textual canons
oral ‘encoding’ of textual canons
some new Suttas are edited together/generated
increasing development of Abhidhammas
ongoing development of & additions to various Vinayas
increasingly urban, year-round Buddhist monasteries
continuing efforts to secure lay support
preliminary references to Metteya
relic/stupa veneration by lay & monastic folk
growing monastic roles in funerary rituals & spirit cults
ca. 250-150 BCE
inter-regional consolidation of textual canons into proto-Agamas/Nikayas
Asokan benefaction supports concerted missionizing (Sri Lanka, Nepal, Gandhara…)
burgeoning ideas about merit transfer based on filial piety
established references to past Buddhas
ca. 100 BCE
proto-Mahayana sentiments (merit transfer “to all beings”, book cults, proto-Prajnaparamita, etc.)
increasing glorification of the Buddha (aggrandized omniscience, stupa cults, etc.)
growing Buddhist traffic along the Silk Road
first edition of the Milindapanha
ca. 50 BCE
Nikayas written down in Sri Lanka
ca. 100 CE
first anthropomorphic sculptures of the Buddha
ca. 200-250 CE
China is collecting Buddhist texts of all sorts
ca. 250 CE
An Shigao / An Xuan / Lokakṣema arrive in China