Home is where the heart is. Security, comfort, even love, are all feelings that are centered on the humble abode. But what if there is more to the feeling of being at home? Neuroanthropologist John S. Allen believes that the human habitat is one of the most important products of human cognitive, technological, and cultural evolution over the past two million years. In Home, Allen argues that to "feel at home" is more than just an expression, but reflects a deep-seated cognitive basis for the human desire to have, use, and enjoy a place of one's own. Allen addresses the very basic question: How did a place to sleep become a home? Within human evolution, he ranks house and home as a signature development of our species, as it emerged alongside cooperative hunting, language, and other critical aspects of humanity. Many animals burrow, making permanent home bases, but primates, generally speaking, do not: most wander, making nests at night wherever they might find...