Empathy probably started out as a mechanism to improve maternal care. Mammalian mothers who were attentive to their young's needs were more likely to rear successful offspring.
Frans de WaalThe chimpanzees could tear me apart in no time. They're many times stronger than we are.
Frans de WaalEmpathy as a complex emotion is different. It requires awareness of the other person's feelings and of one's own reactions. The appropriate reaction may not be to cry when another person cries, but to reassure them, or even to leave them alone.
Frans de WaalWhen it comes to social interaction, the chimpanzees appear to be just as intelligent as we are.
Frans de Waal