Bachelard called them "the hormones of the imagination." Hegel observed that, "through the four elements we have the elevation of sensuous ideas into thought." Earth, air, fire, and water are explored as both philosophical ideas and environmental issues associated with their classical and perennial conceptions. David Macauley embarks upon a wide-ranging discussion of their initial appearance in ancient Greek thought as mythic forces or scientific principles to their recent reemergence within contemporary continental philosophy as a means for understanding landscape and language, poetry and...