If we could make every man upon the earth get him a wife, live righteously and serve God, we would not be under the necessity, perhaps, of taking more than one wife. But they will not do this; the people of God, therefore, have been commanded to take more wives.
The above quote is from Brigham Young in an address he gave in 1873 (JoD 16, pp. 166). Polygamy really isn’t a topic I’ve dedicated very much time to, but I thought this quote was interesting in light of the fact that many of the early saints believed that polygamy, not monogamy, was the “default” marriage system for mankind.