Legacies of Evolutionary History

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Chapter Nine

• Legacies of Evolutionary History

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Important Points

• Malfunctional Design Features
• Life in the Stone Age
• Death in the Stone Age

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Malfunctional Design Features

• The positioning of the esophagus and the trachea
• Evolution of Respiratory system
• The Eye
• Blind spots
• Shadows
• Detached Retina

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The Finishing Touch

• The human body is adapted to life in the Stone
  Age.
• The body has not adapted to the living conditions
  of the present.
• Many of the traits that were beneficial to our
  ancestors, are detrimental to present generations

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Death in the Stone Age

• Life of enormous difficulty and hardship
• Mortality rate
• From infancy to old age
• Infectious disease
• Variety in abundance of resources

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Life in the Stone Age

• No direct evidence
• Questions answered with variety
• Societal structure
• Economic structure

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Summary

• The human body contains defects that occurred
  solely because of the history of the evolution of
  the trait.
• Now people are more well off in their environment
  than the humans of the Stone Age.
• The same areas that affect mortality now,
  affected the humans of the Stone Age, just
  through different methods.

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