Indo-European topics
extinct Anatolian&_160;· Paleo-Balkans (Dacian,
Phrygian, Thracian)&_160;· Tocharian
historical Anatolians (Hittites, Luwians)
Celts (Galatians, Gauls)&_160;· Germanic tribes
Illyrians&_160;· Italics &_160;· Cimmerians&_160;· Sarmatians
Scythians &_160;· Thracians (Dacians) &_160;· Tocharians
Indo-Iranians (Rigvedic tribes, Iranian tribes)&_160;
The Comparative method was developed in the 18th century and applied first to Indo-European languages. The existence of the Proto-Indo-Europeans has been inferred by comparative linguistics. At first, the various languages that have come to be called Indo-European were simply compared, with no attempt at reconstruction. Such studies started in the 19th century but no consensus was reached about the internal groups of the IE family.