The Banning of Polygamy?

My theory is that, with the embrace of Christianity by pagan Rome, what developed was a actually more of a hybrid religion (we can also see this at work in the catholic church even today, where converts from various cultures retain certain aspects of their pagan customs , rituals etc.). So what we ended up with was more of a Romanized Christianity, rather than a Hebrew Christianity...I hope that makes sense, and I think Augustine's statements below bears this out rather well.

Augustine :

"Saint Augustine saw a conflict with Old Testament polygamy, and wrote about it in *The Good of Marriage* (chapter 15, paragraph 17), where he stated that though it "was lawful among the ancient fathers: whether it be lawful now also, I would not hastily pronounce. For there is not now necessity of begetting children, as there then was, when, even when wives bear children,
it was allowed, in order to a more numerous posterity, to marry other wives in addition, which now is certainly not lawful." He declined to judge the patriarchs, but did not deduce from their practice the ongoing acceptability of polygamy. In another place, he wrote, "Now indeed in our time, and in keeping with Roman custom, it is no longer allowed to take another wife,
so as to have more than one wife living."

The Religious origins of Law

I want for those Christians who say that we do not need to follow God's law any longer, but emphasize that we do need to follow man's law, to carefully consider the following:

"Law is in every culture religious in origin. Because law governs man and society, because it establishes and declares the meaning of justice and righteousness, law is inescapably religious, in that it establishes in practical fashion the ultimate concerns of a culture. Accordingly, a fundamental and necessary premise in any and every study of law must be, first, a recognition of this religious nature of law." RJ Rushdoony, Vol. 1, The Institutes of Biblical Law, p. 4

Also:

"Modern humanism, the religion of the state, locates law in the state and thus makes the state, or the people as they find expression in the state, the god of the system." Ibid. p. 5

I am truly saddened to have realized while typing this paragraph that many Christians today, Christians who will say on the one hand that we are no longer required to follow God's perfect law, will, when confronted with something completely biblical yet illegal according to humanisms current, rather fluid law systems (such as homeschooling in the recent past, or perhaps plural marriage in the future), run off and grab their bibles, ruffle through the pages, and find the verses from Paul (Romans 13:1-7) that tells us that we must obey the law of the land! Have they forgotten Daniel? What about Acts 5:27-29? Whom is it that they really serve, God or man?

Grace & Peace,
Joshuah