Lai [a Kuki-Chin language] apparently reflects the typological profile of Tibeto-Burman before the great spread of this family into Southeast Asia.
A fourth point is illustrated by secondary developments in Kuki-Chin, which has innovated new complexity and then, in some branches, jettisoned the old.
In one we find substantial archaic morphology, as in rGyalrongic, Nungic, Kiranti, in some varieties of Kham within Magaric, and in dramatically modified form in Jinghpaw-Northern Naga and vestigially in Kuki-Chin. In the other, exemplified by Kuki-Chin, we see an innovative paradigm with only a few traces left of the ancient system.
Boro-Garo Kuki-Chin Northwest: Moyon, Monsang, etc.
Complexity in Kuki-Chin is a distinct question, as we will see.
The innovative complex type is particularly characteristic of the Kuki-Chin branch.
This context (which the paper does not describe) explains the orientation of the chapter: a survey shows that (a) quite a few languages have the distinction in the pronouns; (b) only a few have it in person markers on verbs: Kiranti (E Nepal) and Chin (Kuki-Chin
, SW Myanmar and NE India); (c) for those languages exhibiting the opposition in the pronouns, the author thinks that "usually the exclusive form is less marked and historically prior to the inclusive form", and he infers that the distinction cannot be Proto-TB.