Read the excerpt from a vindication of the rights of woman.

let there be then no coercion established in society, and the common law of gravity prevailing, the sexes will fall into their proper places. and, now that more equitable laws are forming your citizens, marriage may become more sacred: your young men may choose wives from motives of affection, and your maidens allow love to root out vanity.

what is the central idea of the excerpt?

in proper societies, there are strict laws about marriage.
men will fall into submission when their wives are well educated.
in equal roles, men and women will establish more meaningful marriages.
men and women should marry for reasons other than love and affection.