Nature is simply a collective noun, a name for the sum total of the universe. Christianity which is Biblical Christianity, has no use for any form of personification of nature save as a literary device to convey some message. Hence, strictly speaking, Christianity speaks not of the law of nature but the laws over nature. Second, Christianity does not teach that nature is normative. This is the error of the moral anarchists.
Nature is infected by sin and death.
Third, Christianity does not believe in the Darwinian demolition of any absolutes which govern and control nature despite nature's infection by the Fall. The Bible teaches that man is a creature that is more than biology, and man's law is more than a phase of his social evolution which changes as man changes. Man's reference point, therefore, is not society but God. True, the law of man's being is derived, but it is derived from God and not from society. Man must not be judged socially but religiously, not by his fellow men but by God.