Answer:
monogamous marriage
Explanation:
Engels believes owing of property first occured between men and women having monogamy as a means where private property will reflect a man's desire to control it.
The man is given the supremacy over the women, and he discusses how the nature of the monogamy is then normalized as a relationshipt that ensures private ownership.
Pairing property and economy with a monogamic family is a means for securing possesing ownership of good and private property.
He contrasts primite forms of organization , then reviews history , and poses how time leads to an antagonism between private proverty and class struggle,
