The Stranger in the Woods: The Extraordinary Story of the Last True Hermit

by Michael Finkel

One’s desire to be alone, biologists have found, is partially genetic and to some degree measurable. If you have low levels of the pituitary peptide oxytocin—sometimes called the master chemical of sociability—and high quantities of the hormone vasopressin, which may suppress your need for affection, you tend to require fewer interpersonal relationships.