Earlier, there were several languages belonging to this language group, but mainly because of the intensive spread of IE languages in Western Europe, the area of the Basque languages has shrunk ever since. It is probable that the entire Atlantic Coast was linguistically Basque during the Last Glacial Maximum (LGM) and the millennia after it. The area was homogeneous also in respect to subsistence system and genetics: the men were reindeer hunters and their main Y-chromosome haplogroup was R1b. ↑ Lozny, Ludomir R (2011).