Why do parents teach their children to hold chopsticks and shoes with their right hands when they are young?

In the early stage of the evolution of human society, in the process of fighting, because our heart is located on the left side of the chest, it gradually evolved into a left hand holding a shield to protect itself and a right hand holding a spear to attack and throw. In the long-term evolution process, due to the increase of the scale and intensity of the war, the right hand has been paid more and more attention and used, becoming the most important' handedness' (the concept of limb dynamics refers to the most important role of limbs in sports.

I personally believe this. Throughout the ancient wars between China and the West, without exception, the right hand held the attack weapon and the left hand held the shield.

However, science is like this, and there can never be only one explanation and answer. No matter which one you believe, some scientists have put forward another one: the theory of gene determination.

2. Genetic determination theory

A scholar from Columbia University in the United States did an experiment: in front of volunteers, two uncommon words, one left and one right, flashed at the same time, and then asked them which one they saw. As a result, most people only saw the left, not the right.

This can prove that human reading habits are good at reading from left to right, so of course, when writing, we should also write from left to right, and holding the pen in the left hand will have the disadvantages of getting ink and blocking the line of sight. Therefore, most languages in the world are written from left to right, and because of the widespread use of the right hand, they have become more and more flexible and become the main players.

Then someone must ask, there are still many languages in the world (Hebrew, Arabic) written from right to left, so why not do the experiment just now?

Haha, you hit my gun. Researchers at Columbia University are very thoughtful. They invited Israelis and Arabs to the laboratory and the test results were exactly the same.

We usually talk about it as a habit problem in life.