Uralic languages impetus from the fact that these languages, unlike most of the other languages spoken in Europe, are not part of what is now known as the Indo-European family. In 1717, Swedish professor Olof Rudbeck proposed about 100 etymologies connecting Finnish and Hungarian, of which about 40 are still considered valid. Several early reports comparing Finnish or Hungarian with Mordvin, Mari or Khanty were additionally collected by Leibniz and edited by his assistant Johann Georg von Eckhart. In 1730, Philip Johan von Strahlenberg published his book ("The North and East Parts of Europe and Asia"), surveying the geography, peoples and languages
Uralic–Yukaghir languages World's Languages" by Merritt Ruhlen (1987). Uralic and Yukaghir are listed as a language family, forming a subgroup of a higher-order family called "Eurasiatic", in Joseph Greenberg's "Indo-European and Its Closest Relatives" (2000–2002). However, Greenberg did not present a discursive argument for this subgroup, presumably leaving it to the reader to work it out from the data on grammar and vocabulary he presented. The Uralic–Yukaghir family has been accepted by the American Nostraticist Allan Bomhard (2008:176, citing Ruhlen 1987:64–65) but without presenting any argument for it, and Russian linguist Vladimir Napolskikh. Collinder summarizes his case for, not merely a relationship