Not bad. On the last paragraph of page 5 or 6 you say that one of your points is "obvious". Personal preference thinks you should avoid that termHey, thank you so very much @FollowingHim. For those who wish to read and comment.... thank you.
Do you have citations for some of your info? If it's just for interested friends, it's pretty good. If you plan to submit it for publishing, you will need a few citations.
Nice work.
* Note: there are some threads on here that give different viewpoints on what constitutes a marriage (sex, covenant, possession, etc). You may want to consult those.