From a review of Antonio Damasio's new book on consciousness:
Damasio does not view consciousness and culture as resulting from some additive ingredient unique to human beings: reason, logic, or language. In this story, a form of awareness appears in all animals equipped with nervous systems. Differences in animal mental life emerge with increasing anatomical complexity. Human beings are sophisticated, feeling, affective, social body-subjects who may speak, write, make art, and build technologies, but we share the homeostatic impulse with all other living things.