Comment by Red_Tarsius

Civilization is built on monogamy. People might not like the sound of it, but that's the reality of the situation. This is why all successful cultures and religions promote marriage, while tagging everything else as 'degeneracy'. You can't build a society if 90% of men are frustrated, disenfranchised and blow things up, and children are raised by single parents. You need a social contract that gives men a purpose and a legacy (sex), so that they can focus their efforts toward the development of the tribe.

EDIT: To clarify, I do NOT condone violence toward non-traditional arrangements. Sorry if I came off that way.