Our morality is incongruous with the law of the time. The two biggest examples I can think of are slavery, honor killings, genital mutilation.
Be careful of rules.
Be more careful of norms, for they are just silent rules that are culturally accepted. They are deadly just the same. They lead us through a mediocre life void of living.
Find the norms, the rules, and break them with vigor. Smash them with a happy heart.