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Tabla de Contenidos:
  • 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.