When you are born, the only rights you have are those others are willing to defend for you, so these rights, if any, are cultural, not natural.

"Natural rights are exactly as knowable as invisible pink unicorns: anybody can fantasize them any way they want. Bentham famously dismissed the idea of natural rights as “nonsense on stilts”. Unfortunately, most libertarians start with this philosophical abomination rather than more factual alternatives."

I forgot who I am quoting here. Will try to look it up.