From one of the most lively sections in Origin of Species:

This ant is absolutely dependent on its slaves; without their aid, the species would certainly become extinct in a single year. The males and fertile females do no work of any kind, and the workers or sterile females, though most energetic and courageous in capturing slaves, do no other work. They are incapable of making their own nests, or of feeding their own larvae. When the old nest is found inconvenient, and they have to migrate, it is the slaves which determine the migration, and actually carry their masters in their jaws. So utterly helpless are the masters, that when Huber shut up thirty of them without a slave, but with plenty of the food which they like best, and with their larvae and pupae to stimulate them to work, they did nothing; they could not even feed themselves, and many perished of hunger. Huber then introduced a single slave (F. fusca), and she instantly set to work, fed and saved the survivors; made some cells and tended the larvae, and put all to rights.
What must be noted is the propinquity of this passage to the most famous chapter in Hegel's Phenomenology of Spirit, "Master and Slave." In that chapter, which is often to seen as the grund of Marxism, Hegel argues that because the world is more and more made and shaped by slave labor—serving, building, putting "all to rights"—the world makes more and more sense to slaves and less and less sense to the masters ("so utterly helpless are the masters"). The masters only know how to destroy; the slaves know how to create.