"LEAVE FOR POSTERITY" - What will we leave for future generations?

This is largely divided into two types: Genes (genes) are passed down from parent to child as a physical inheritance, and are passed down for generations to leave descendants; Memes (culture/information) are creations, art, stories, etc. that humans have created, copied from one person to another, and are passed down. Both genes and memes are essential elements for the evolution of humanity. Genetic joys allow us to turn our desire for prosperity into a story, rather than leaving our outward descendants. Memetic joys allow us to leave information and ideas in a different form, rather than just leaving descendants, as a form of legacy to future generations. We are in a period of change, and while it has traditionally been said that the purpose of life is to leave descendants instinctively, we are now in a real world where the environment for leaving descendants and people's thoughts are also changing. Some people choose not to leave descendants. In such a world, it is up to us to decide what we want to leave behind for future generations, whether it be our descendants or our own ideas (creations, ideas), or both. Those who leave descendants will hope for "prosperity of descendants", while those who do not have descendants have the option of leaving behind in a different form. Leaving behind one's thoughts, works, and stories will also lead to the purpose of life. Such meme-like modern ways of leaving behind are now being emphasized. It is up to you to choose what to leave behind. Whether it be Gene's descendants or one's own meme-like creations, leaving something behind for future generations is the happiest thing for a human being. In this story, which is likened to a "chick", which is a nickname and a hidden word, the "infinite happiness" that Thunderbird originally meant may be the ever-changing flow of everything. In that, how do you leave a copy of yourself behind? In conclusion, since I have a precious child, I would like to convey that if I can leave even a little of my "prosperity of descendants" and my "works and stories", which are my reason for living and my job, to future generations, it will be infinite happiness.