Briefly Noted Book Reviews

Philosophers have long debated the nature of consciousness. This probing study takes an evolutionary approach, examining "experience in general" not only in humans but in much of the animal kingdom. Animals, it argues, developed consciousness gradually, through such biological innovations as centralized nervous systems and the ability to distinguish one's actions from external forces, which have given rise to "varieties of subjectivity." The author is crisp on a subject notorious for abstraction, dissecting fuzzy philosophical metaphors and weaving in lively descriptions of the octopuses, whale sharks, and banded shrimp he observes on scuba dives off the coasts of Australia. Born in 1797 in Düsseldorf, then under Napoleonic occupation, Heine remained a committed liberal even as Germany turned inward after the Congress of Vienna.