Well, we’d first have to define these things a lot more clearly, and distinguish between text, doctrine, and practice. For example, what is considered to be “Theravada” in theory is very different from Buddhism as practiced in “Theravada” countries by people who would consider themselves “Theravadins”. That is, we have a narrow, textual and doctrinal, view of Theravada, whereas it is in fact a full religious tradition, with its hierarchies, magic, ritual, and superstitions.
Many of the ideas doctrinally regarded as “Theravadin” are not really accepted or understood by most Theravadins; for example, many Theravadin death rituals assume that there is a period between life and life.
Within the broad tent of early Buddhism, there is a general agreement on certain kinds of things; for example, that the Buddha taught a rational doctrine with meditation at its core, which taught the escape from suffering; and that he did not teach, or at least did not emphasize, the worship of relics, for example.
My point here is really this: if there seems to be a lack of a simple and well-defined list of differences between the two, that is probably because those who are familiar enough with the field to understand the differences appreciate that it is a lot more complex than it looks!
There are other studies in these areas. I have looked at one important area in my A History of Mindfulness. Having said which, I don’t find the depth of research in this book particularly compelling.
There are a variety of works along similar lines, and they keep bringing up the same passages and ideas. I can think of two reasons why that might be the case:
- They are really on to something, and the suttas are saying something quite different from what we thought.
- There is a systematic problem in how such studies are undertaken and framed, a bias in reading that shapes findings in predictable ways.
I have found that scholarly work is most useful when it focuses on small and specific areas, when it addresses social, economic, or material aspects of the texts. The problem, I believe, is when scholarship tries to scale up its methods—breaking big problems into reductive units, then reassembling the big picture from atoms—so that the same principles are applied to profound matters of consciousness. The mistakes in small things, which are many, become hidden under the big tent, and an illusion of certainty is created.
Ven Bodhi would generally accept the same distinctions as any other historically-minded scholar.
That’s too reductive. It is an early example of the Abhidhamma tendency. There are many other such early indications of early “abhidhammic” tendencies, including the Satipatthana Sutta, the formal structure of the Samyutta, the discussions on meaning found in the Suttas, the formal structure of the Vinaya, and so on. It was a broad-based movement, not a specific text or set of doctrines.
Yes, tradition ascribes a close relationship between Sariputta and the origin of the Abhidhamma, and in the non-reductive sense, this is obviously true.
This is true, and most followers of EBTs would accept this.