According to this text from the preamble to the declaration who gives man their an unalienable rights

Jefferson understood "unalienable rights" as fixed rights given to us by our Creator rather than by government. The emphasis on our Creator is crucial, because it shows that the rights are permanent just as the Creator is permanent.

"Unalienable rights" are ours to keep, by virtue of our Creator. So said Thomas Jefferson through the Declaration of Independence, and he was seconded by James Madison through the Bill of Rights.