In his book "The Selfish Gene", Dawkins created a new word corresponding to gene, and some scholars translated it into a meme.

It means: "The basic unit of social culture and civilization that is transmitted and reproduced through non-genetic means."

Genes are inside the nucleus of an organism's cells. Memes exist in our brains in the form of stories, art designs, music, beliefs, scientific theorems, recipes, etc.

When we have a new idea, we create a new meme; when we tell others about the idea, we spread the meme. .

Therefore, memes are being created all the time, being passed on and reproduced all the time, and being annihilated all the time. Good memes are spread around and eventually survive, while ineffective memes quickly disappear, and the fittest survive.

The scientific memes that saved people from the threats of hunger and disease were preserved. Memes like the magic stick's incantation and the superstition of witchcraft are quickly dying out.

Not all memes are worth spreading.

In the face of memes that threaten humanity, there are also memes of environmentalism and pacifism that are keeping these harmful memes in check.

From Liu Jia's "30 Lectures on the Basics of Psychology"