So, "inalienable" I can understand.

"Bestowed by their Creator" starts leaning very heavily on a specific religion's doctrines, and given that there is no religion which is universally adhered to by all persons, dominant in all nations, or indeed acknowleging that "no religion" is the belief of a substantial portion of the population, then regardless of the legacy of the phrase, it's not especially useful in discussion and to me seems to obscure more than it reveals.

Could you choose an alternate phrasing?