To the point: Caesar's granting of citizenship to Gaellic legionaries and nobles who supported his cause, appears to be a policy of dissipating the economic, and hence political power, of the Gaellic nobility.
I understand he had killed 6 million Gael before he got to this point. I can swear there ain't no heaven but I pray there ain't no hell. _ Blood Sweat & Tears
My Copy of Livi-Bacci´s A concise history of world population gives the population of Europe (excluding the areas in the cold war USSR) to 31 million around year 0. With a similar distribution of population as today the Gael of the time should have had a population of around 4 million...