A group of languages from which most modern European languages are derived, as well as Indian Sanskrit and the Farsi language of Iran. It is assumed that the dispersal of these languages must have occurred through large-scale migrations of people. Attempts have been made to identify the carriers of Indo-European languages with groups recognizable in the archaeological record. When the groups were literate or are recorded in other people's documents, as with the Hittites and the Luwians in Asia Minor, it is possible to establish that the groups were indeed Indo-European speakers. One school maintains that the original homeland was in the south Russian steppes in the 5th millennium BC and spread into Europe with the Single Grave, Corded Ware, and Globular Amphorae groups. Indo-European was first recognized by Sir William Jones in 1786. It includes most of the modern European languages (Romance, Germanic, Slavic, Baltic, Greek, Albanian) and modern Indo-Iranian (Persian, Hindi).