system
Given the following post, respond as if you're commenting on Reddit:
human
CMV:I believe that bigamy laws are both unconstitutional and outdated.

I've never understood how the government can justify legislation on how many people you can legally have in your family. The laws seem to favor one religious view over another, which is unconstitutional. Are the laws outdated, or were they just wrong to begin with? I understand the implications with regard to taxation of married couples vs. singles, but that just means that we have another reason that we need to take a better look at our tax code, not that it should be used as a reason to keep people from having a legal marriage. Beyond that there is no secular reason for making plural marriage illegal, and religious reasons are unconstitutional.
gpt
One thing to consider here is that plural marriage as historically practiced is also outdated and a solid reason for the laws to exist: to wit, consent of all parties in the first (etc.) relationship/marriage is not required for a second (etc.) marriage to take place. Sometimes even knowledge of the other relationship is lacking. 

We can't simply erase the bigamy laws. We have to replace them with regulation defining plural marriage and emphasizing that it exists among consenting adults who all agree that a plural marriage of some form is the best decision for them. But we need something on the books that says everyone in a marriage has to agree and consent to someone's or the group's taking on another spouse,  or something like the current crime of bigamy does exist.