Some natural rights might exist. Take existence for example. Something comes into being through whatever natural forces, it exists. Does it not have the right to continue to exist? I'm not sure we should apply this to rocks and trees, but people certainly, and though I'm not a vegan, maybe even animals. Do we have the right to wipe out a species of virus?
The existence of the concept of "natural right" cannot be verified. "Natural rights" do not exist in the same way that a boar or an oak tree do. They are, rather certain ideas regulating social relations within a specific historical period. But those ideas didn't fall from the sky (and they are not God-given) - they are a product of the historical development of exactly those social relations within which they operate as regulatory mechanisms (ultimately backed by threat of force).
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“The possibility of securing for every member of society, by means of socialized production, an existence not only fully sufficient materially, and becoming day by day more full, but an existence guaranteeing to all the free development and exercise of their physical and mental faculties – this possibility is now for the first time here, but it is here.” Friedrich Engels
"The proletariat is its struggle; and its struggles have to this day not led it beyond class society, but deeper into it." Friends of the Classless Society
"Your life is survived by your deeds" - Steve von Till