Don Ringe is Professor of Linguistics at the University of Pennsylvania. He was educated at the Universities of Kentucky, Oxford, and Yale, and has taught classical studies and linguistics at university level since 1983. His numerous publications on comparative Indo-European and historical linguistics include the OUP volumes From Proto-Indo-European to Proto-Germanic (2nd ed., 2017) and The Development of Old English (with Ann Taylor, 2014).
Don Ringe's The Linguistic roots of Ancient Greek is a useful handbook of the major developments of Greek from its ancestor language Proto-Indo-European (PIE) down to roughly the 5th c. BCE. * Daniel Kölligan, Bryn Mawr Classical Review *