African bees demonstrate the biological reality of race
Here's an interesting article on so-called "Africanized" bees.
In this age of political correctness, we are often told that the taxonomic category of race is only a social construct; an illusion. There is also the school of thought that behavior is infinitely malleable, and has nothing to do with genetics. The existence of the African race of bee disproves both of these rather unscientific ideas, and shows the necessity for keeping this taxonomic distinction. Race is a biological reality. You might want to keep that in mind the next time someone tries to tell you that race is "only a social construct", and that to believe otherwise is "racist".
I don't have references handy, but I do recall reading somewhere that very little hybridization with European honeybees has been taking place. What happens instead is a kind of "white flight" of the insect world, with European genetics quickly vanishing in invaded areas, since virgin queens appear to prefer mating with African drones. If so, this could quash hopes of producing a stable hybrid which has the relative gentleness of the European bee along with the vigor of the pure African strain. Also, no one seems to consider that the characteristics of aggression and vigor may be genetically linked in the African bee. But it's conceivable that it might turn out to be the case that you can't have one without the other.