Argentine ant paralleled only by human society", and had probably been spread and maintained by human travel. They have been extraordinarily successful, in part, because different nests of the introduced Argentine ants seldom attack or compete with each other, unlike most other species of ant. In their introduced range, their genetic makeup is so uniform that individuals from one nest can mingle in a neighboring nest without being attacked. Thus, in most of their introduced range, they form supercolonies. "Some ants have an extraordinary social organization, called unicoloniality, whereby individuals mix freely among physically separated nests. This type of social organization is
The Ant and the Grasshopper 166 in the Perry Index. It relates that the ant was once a man who was always busy farming. Not satisfied with the results of his own labour, he plundered his neighbours' crops at night. This angered the king of the gods, who turned him into what is now an ant. Yet even though the man had changed his shape, he did not change his habits and to this day goes around the fields gathering the fruits of other people's labour, storing them up for himself. The moral given the fable in old Greek sources was that it is easier