This thread reminds me of something written long time ago in the old books of Physical Anthropology. ThThere were some observations on the so-called Dinaric phenotype in the Balkans noting that people with such phenotype tend to act like an alpha-males, being more aggressive, more war-like, more spontaneous. Their physical traits are robust, wide jaws, often with cleft chin, great height, athletic body build, long noses. The way they act with all their manliness and aggression seems connected to the Y-chromosome which has something to do with that and their physical traits are a product of higher tostosterone levels which is again connected to the Y-chromosome. The core area of this population is in the countries of ex-Yugoslavia (Western Balkans) and it falls almost in the middle of the I2a-Din YDNA hotspot. There could be some connection. Also, part of the I2a-Din is of local origin and it existed in the same geographical area as now, so it was something common among the ancient Illyrians and Thracians who were considered to be very warlike and aggressive, although that was also ascribed on the Celts and all other barbarians north of the Greeks and the Romans. Otherwise, the Dinaric phenotype is also found in Italy, Germany, France and Iberia where there seem to be no connection to I2a-Din.