MONOGAMY
Monogamy is the ideal prescribed by Scripture (Gen. 2:18-24; Mt. 19:5; 1 Cor. 6:16). Only it allows the total unity of the two spouses, while polygamy makes it impossible.
The Creator confirms this fact by giving birth to an approximately equal number of males and females. He also wants marriage to be a permanent relationship (Mt. 19:6).
Normally, affection between husband and wife develops over the years. Morality condemns breaking the contract. Because of their obligations, husbands must discipline themselves and raise their children by teaching them to preach good.
Marriage is indissoluble before death, except in cases of adultery (Rom. 7:2, 3; Mt. 19:3-9). Paul notes that there are arbitrary ruptures, comparable to desertion (1 Cor. 7:15).
The cases to which the apostle refers were probably accompanied by marital infidelity. Remarriage of illegitimately divorced persons is prohibited (Mt. 5:32; 19:9; 1 Cor. 7:10, 11).
The ruling of a civil court does not annul the marriage before God; declares whether the breakup has been caused by the sin of one of the spouses or both. It appears that Adam, Cain, Noah and their three sons were monogamous.