In addition to what would now be viewed as pseudo-scientific studies of race, which tended to reinforce a belief in an inherent mother-country racial superiority, a new supposedly "science-based" ideology concerning gender roles also then emerged as an adjunct to the general body of beliefs of inherent superiority of the colonial era. Female inferiority across all cultures was emerging as an idea supposedly supported by craniology that led scientists to argue that the typical brain size of the female human was, on the average, slightly smaller than that of the male, thus inferring that therefore female humans must be less developed and less evolutionarily advanced than males. This finding of relative cranial size difference was later simply attributed to the general typical size difference of the human male body versus that of the typical human female body.