: How were sentences formed, and what did the words mean? Evolution : How did the language change over time?

: Across 125 chapters, it covers every major branch (like Germanic and Celtic) and most minor or fragmentary languages (such as Venetic or Messapic).

For over a hundred years, scholars seeking a definitive guide to the origins of our most widely spoken languages had to rely on Karl Brugmann's Grundriss , published in the late 19th century. That changed with the release of the , a monumental three-volume work edited by Jared Klein, Brian Joseph, and Matthias Fritz .