If we, in the western world, see a peasant beating an emaciated old donkey, forcing it to pull an oversize load, almost beyond its strength, we are shocked and outraged. That is cruelty. But taking an infant chimpanzee from his mother’s arms, locking him into the bleak world of the laboratory, injecting him with human diseases – this, if done in the name of Science, is not regarded as cruelty.

