On the grammaticalization of personal pronouns

Unlike most other grammatical domains, that of personal pronouns is clearly under-researched in works on grammaticalization. One reason can be seen in the fact that personal pronouns differ in their diachronic behavior from most other grammatical categories to the extent that they present a challenge to grammaticalization theory. In the present paper it is argued that in order to account for this behavior, an extended understanding of grammaticalization is needed.