Well depends on who you ask. I generally think laws should be codifications of societal norms. Which also implies that as societal norms change so should laws.

Well depends on who you ask. I generally think laws should be codifications of societal norms. Which also implies that as societal norms change so should laws. So even things such as murder which people do and we don't want should be codified as illegal. But even if nobody committed murder anymore it should still be illegal as its against societal norms.