The term of art for 1-woman, multi-husband arrangements is "polyandry". The Wikipedia entry [1] has a citation to a survey that finds about 50 out of about 1230 known societies in a 1980 ethnographic atlas practicing polyandry, so it is a distinct minority community-scale arrangement.
The next public, conventional taboo to broach is group and line marriages. As economic conditions worsen for some nations' middle class in the upcoming decades, line marriage can potentially offer a coping mechanism, trading off resource collectivization and time in exchange for recapturing increased security of various forms.
The next public, conventional taboo to broach is group and line marriages. As economic conditions worsen for some nations' middle class in the upcoming decades, line marriage can potentially offer a coping mechanism, trading off resource collectivization and time in exchange for recapturing increased security of various forms.
[1] https://en.wikipedia.org/wiki/Polyandry