" Domesticating the ant was no easy matter. The little red scientists had not even believed such creatures were possible, because of surface area-to-volume constraints, but there they were, clumping around like intelligent robots, so the little red scientists had to explain them. To get some help they climbed up into the humans' reference books, and read up on ants. They learned about the ants' pheromones, and they synthesized the ones they needed to control the soldier ants of a particularly small docile red species, and after that, they were in business. Little red cavalry. They charged around everywhere on antback, having a fine old time, twenty or thirty of them on each ant, like pashas on elephants. Look close at enough ants and you'll see them, right there on top.
But the little red scientists continued to read the texts, and learned about human pheromones. They went back to the rest of the little red people, awestruck and appalled. Now we know why these humans are such trouble, they reported. Humans have no more will than these ants we are riding around on. They are giant meat ants. The little red people tried to comprehend such a travesty of life. "
― Kim Stanley Robinson , Blue Mars (Mars Trilogy, #3)