I thought the opening paragraph was fine, and your intention clearly stated in the last sentence.
Though still not equal, the perception of women's roles today appears less stereotypical than in the past.
Children's literature reflects the times ...this sentence was started with the word 'furthermore' and I took it out because it was used a couple other times, and seemed repetitive.
For the most part, alternative family units were greatly opposed by past societies.
Good subject and nicely written. (And I agree with you!)