Is there, in the opinion of the members of the “Philosophy” community, a certain fundamental law of human existence that would serve as the main motivation for human activity — both in everyday life and in practically all spheres of social life?I believe that such a law exists. I am ready to present both the formula of such a law and my arguments, and to discuss this topic if it interests the members of the community. I would be grateful for future comments.

That is a question dripping with assumptions. I’m willing to engage, but only if you start by elaborating on what you mean when you say “a certain fundamental law of human existence”. That is such a vague phrase that it’s almost meaningless.