The Batak as They Were -- The Batak as They Are Today -- Demographic Evidence of Adaptive Difficulty -- Physiological Evidence of Adaptive Difficulty -- Increased Stress Levels as the Cause of Adaptive Difficulty -- Decreased Stress-Coping Ability as the Cause of Adaptive Difficulty -- Ethnic Identity, Human Motivation, and Tribal Survival
Bibliography
Includes bibliographical references (pages 251-271) and index