You have heard that the body is the first property of us, that part precisely that we are not the body, but we are something else, an essence, immaterial, like the soul, and as you know is a Christian argument.

You don't have to believe in God for natural rights to exist, you only need to believe in the existence of something metaphysical, immaterial, or intelligible. Ideas can indeed exist, we can know them by abstraction, the world is not only that which can be touched, smelled, heard, tasted or seen, that is a reductionism that has no logical basis and is based on sensations, if this were true, then communism would be more successful than capitalism or the free market, but it is not like that.

But of course, if you don't believe in anything that is not material, there are only two valid options; the first, Marxism, which eliminates the State, morals, borders, nationalities, even genres, and it is not because such things are oppressive, but because for them nothing that can't be seen is real; the second, the law of the jungle, the strongest govern by being stronger. Both options lead to the collapse of civilization, because as you well know, "civilization" is in itself a concept.