I would guess that both monogamy and historical gender roles derive from the economics of an agricultural society. We had thousands of years where almost all pe

I would guess that both monogamy and historical gender roles derive from the economics of an agricultural society. We had thousands of years where almost all people were agriculturalists. It’s only within the last hundred or so that we have large numbers of people no longer closely tied to agriculture. I expect both expected gender roles and our societal concept of marriage to undergo profound changes.