The Bible nowhere upholds polygamy as a legitimate practice. God’s will is expressed not only in the specific commandments of the law but in His creative acts as well. For example, Jesus shows how God’s will regarding marriage and divorce is expressed in the Creation account. Compare Genesis 1:26–28 and 2:20–24 with Matthew 19:3–6. Notice that the Genesis account of man’s creation does not explicitly say that divorce is contrary to the will of God. Yet, Jesus said, “Have you not read...,” indicating that one should be able to understand from the account that marriage is a God-ordained institution and that divorce is contrary to God’s will. Further, no explicit commandments regarding marital roles are found in the Genesis account, but Paul informs us that God’s will in this matter is reflected in the creation order (1 Corinthians 11:3,8; 1 Timothy 2:12,13). As for God’s will regarding polygamy, the implicit teaching of the Genesis account is clear. God gave Adam only the one wife. “Therefore a man shall leave his father and mother and be joined to his wife [not wives], and they [the two of them—see Matthew 19:5] shall become one flesh” (Genesis 2:24).

The monogamous ideal is reflected in numerous Old Testament passages. The wife of a man who fears God “shall be like a fruitful vine” (Psalm 128:3). A man should rejoice with the wife of his youth, and “always be enraptured with her love” (Proverbs 5:18–20). God speaks strongly against dealing treacherously with the “wife of your youth,” who is “your companion and your wife by covenant” (Malachi 2:14,15). Note the singular in each reference.

Jesus said, “Whoever divorces his wife and marries another commits adultery” (Luke 16:18). Are we to assume that if a man stays married to his wife and yet marries another, he does not commit adultery? (The question is deliberately absurd, but makes the point nevertheless.)

Some have objected to the view that polygamy did not have God’s full approval in the Old Testament. The following are some of the most common objections:

Objection 1: David and other men of God practiced polygamy and concubinage.

Reply: While their cultural situation may “excuse” them to some extent, the fact remains that polygamy never was in accord with the good and perfect will of God. Scriptural narratives of the ancient men of God reveal many sins. The writers rarely paused to moralize, so we are often left with the impression that certain sins were somehow less than sinful.

Objection 2: Exodus 21:7–11 permits polygamy.

Reply: In verse 10, the term translated “duty of marriage” (KJV) should be rendered “oil” or “ointments.” The passage says that if a man buys a female servant with intentions of marrying her, but then changes his mind, he is to continue providing for her.

Objection 3: Leviticus 18:18 and Deuteronomy 21:15–17 assume the existence of polygamy.

Reply: True, but neither passage expresses divine approval of the practice. Deuteronomy 18:18 acknowledges the existence of prostitution, but does not imply divine approval.

Objection 4: Second Samuel 12:7,8 says that God gave David the wives of Saul.

Reply: This passage says that what was once Saul’s is now David’s. Nowhere are Saul’s two wives found in the lists of David’s wives. He took them into his safe-keeping and provided for them, but there is no indication that they became his wives.

Objection 5: In 1 Timothy 3:2, Paul says that a bishop must be “the husband of one wife.” This implies that polygamy existed and was practiced even within the church.

Reply: First, Roman law did not permit polygamy. Second, the Greek expression for “husband of one wife” literally means “one-woman man.” Paul is telling Timothy that church leaders should not be womanizers.