>>514194717 (OP)
The correct answer is their Oxytocin, Dopamine and Vasopressin gene variants are really different to Eurasians and White people. They likely have dopamine loops that encourage completing objectives for dopamine release at any cost, which is linked to laziness and dominance seeking, they probably are more sensitive to pheromones than Whites who are actually the least pheromone sensitive race (they won't emotionally be affected by body odour as much as blacks or Asians). Oxytocin, which is linked to love, friendship, affection and empathy, is found to be at lower levels in their brains than Whites in studies (which suggests a genetic difference). Blacks also have at least one Oxytocin receptor gene mutation linked to callous and non-autistic u empathic behaviour (psychopathy) in children at 3-4x the rate of Whites, and there are likely more. In addition, Vasopressin is a more primitive form of Oxytocin and a neurotransmitter linked to aggression and dominance seeking in animals. Gene mutations in the AVPR1A and AVPR1B genes linked to vasopressin metabolism have been directly linked to more antisocial traits including aggressive personality, lower cognitive empathy and theory of mind thinking when receiving negative social feedback, higher likelihood of physical aggression and lower likelihood of sharing tokens with other participants in game scenarios. There are no official studies outlining it but if you look on genetics databanks like SNPedia or ensembl you'll see that Blacks have freakishly different genetic allele frequencies for AVPR1A and AVPR1B versus literally every other Eurasian race save for Indians and North Africans. So it's extremely likely they have much higher rates of high aggression low empathy hyper selfish Vasopressin variants
TLDR, the racists of the 1800s were right, races have souls and the Black one is impulse driven, heartless and careless.