Chess can rely on reputation since games are short and someone who refuses to play by the rules will find no one to play against (also the stakes are small). (And in high states games, e.g., tournaments you will at least be escorted out for refusing to play by the rules.) Note, that since monogamy assumes someone will only have one spouse ever, reputation is less useful.
A better example is, are we free to engage in commerce if the police refuse to enforce either non-payment or non-delivery? (Especially if they do enforce anti-violence and anti-theft laws against people attempting to take matters into their own hands in cases of non-payment or non-delivery). Another example, would you say companies are free to provide employee pensions if the law says that companies can cancel pensions anytime (even after retirement) and employees (or former employees) have no recourse if a company does cancel it?
monogamy assumes someone will only have one spouse ever [emphasis added]
That's not what I meant by monogamy -- I wouldn't call my relationship non-monogamous just because my girlfriend had sex with someone else years before I even met her, any more than I would call someone who used to eat meat but no longer does a non-vegetarian.
I agree that monogamy in your sense of the word would depend on something guaranteeing that enough people stay virgin until old enough to find a lifetime partner.
...A better example is, are we free to engage in commerce if the p
Another month has passed and here is a new rationality quotes thread. The usual rules are: