The Left Hand Is Just for Support? Why Left-Handers Exist: A History of Left-Handedness

1. A World Built for Right-Handers

• "Play is to the right. Fast-forward is also to the right. And rewind is to the left."

  • Our daily lives naturally assign specific attributes to right and left.
  • For example, game characters like Super Mario run from left to right, and clocks rotate clockwise (to the right).
  • Reading direction in most languages also proceeds from left to right.
  • This phenomenon is closely related to the fact that most people are right-handed.

• "Eating, writing, using tools -- almost everything defaults to the right hand."

  • Globally, the ratio of right-handers to left-handers is about 9:1, with left-handers making up only about 10%.
  • In Korea and Japan, the percentage of left-handers is even lower at 2-5%, while the Netherlands has the highest rate at 13.2%.

2. Humans' Unique Right-Handed Dominance

• "Among vertebrates, the only animals with such an extreme right-handed bias -- besides humans -- are gorillas, chimpanzees, and dolphins."

  • Humans have an unusually overwhelming proportion of right-handers compared to other animals.
  • Traces of right-handedness have been found in prehistoric artifacts and fossils, dating back to Australopithecus (about 5 million years ago).

• "Why do only humans, great apes, and dolphins have this peculiar trait?"

  • The prevailing theory is that this is due to hemispheric asymmetry of the brain.
  • The left hemisphere handles logical thinking, language, and sociality, while the right hemisphere handles emotions, intuitive judgment, and visual imagery.
  • Because humans developed their left hemisphere, which aided survival and civilization, a right-hand-dominant world naturally emerged.

3. A Civilization Designed for Right-Handers

• "It starts right at the dining table."

  • In Korea, the rice bowl goes on the left, the soup bowl in the center, and the utensils on the right.
  • In Western settings, the plate is centered, with the fork on the left and the knife and spoon on the right.

• "For civilized people, writing is just as important as eating."

  • Writing direction was also shaped around right-handedness.
    • Arabic and Hebrew are written right to left.
    • Chinese characters are written vertically with lines progressing leftward.
    • Greek script adopted the Phoenician alphabet but reversed the direction to left to right.

• "Even which side of the road we drive on was determined by right-handedness."

  • Britain maintained left-hand traffic since the carriage era, because it was easier for coachmen to wield the whip with their right hand.
  • Meanwhile, Germany and the U.S. adopted right-hand traffic, because it was more convenient to operate the gear stick with the right hand.

4. Discrimination and Prejudice Against Left-Handers

• "In virtually every language on Earth, 'left' carries negative connotations while 'right' carries positive ones."

  • In Korean, the word for "right" (oreun) is etymologically related to "correct," while "left" (oen) derives from words meaning "twisted" or "avoidant."
  • In Hinduism and Islam, the left hand is designated for unclean tasks, while the right hand is for clean ones.

• "In eras when warfare was a daily reality, the left hand was a symbol of betrayal and misfortune."

  • Since most people wielded weapons with their right hand, left-handers had difficulty earning trust.
  • Shaking hands with the right was a symbol of peace -- showing your weapon hand was empty -- but left-handers could still attack with their free left hand.

5. The Left-Hander's Survival Strategy

• "It was precisely this risk factor that allowed left-handers to survive tenaciously."

  • Left-handers had an advantage in warfare and dueling.
    • Medieval castle spiral staircases were designed clockwise, giving right-handed defenders the advantage, but left-handed attackers could fight more freely.
    • "Left-handers were hard to predict, making them a powerful card in combat."

• "Studies show that societies with more exposure to violence have higher percentages of left-handers."

  • The peaceful Jola people of Burkina Faso have a left-handedness rate of only 3.4%.
  • The violent Yanomami people of Venezuela have a rate of 22.6% -- double the human average.

6. Left-Handers in Sports

• "In the sports world, left-handers dominate."
  • Left-handers have an advantage in competitive sports like baseball, table tennis, and tennis.
  • There's a saying: "A left-handed fireballer is worth bringing back from hell" -- that's how valued left-handers are.
  • This is because left-handers are accustomed to facing right-handers, but right-handers are not accustomed to facing left-handers.

7. The Instinct and Role of Left-Handers

• "Perhaps the left hand is the hand of competition and individuality."

  • Among famous left-handers, there are many artists and soldiers.
  • This may be because left-handers have retained the fighter's instinct that has persisted for millions of years.

• "Living as a left-hander is inconvenient. But sometimes, you have an edge over everyone else."

  • In cooperative situations, left-handers may be at a disadvantage, but in head-to-head competition, they become an exceptional wild card.

8. What the 9:1 Ratio Means

• "Could the 9:1 ratio of right-handers to left-handers mean that human life is made up of 90% cooperation and 10% competition?"
  • Left-handers are an essential minority within the human species.
  • This may be a kind of Easter egg that nature left for humanity.

Conclusion

• "Left-handers may be inconvenienced, but they are equally special."
  • In a human society where cooperation and competition coexist, left-handers remain a presence that keeps everyone on their toes.
  • "This was Kid from the Knowledge Pirates. Thank you."