War is a result of the fall and is a part of living on this earth. At times, God has used war to enact His justice, but even then, He offered peace before war. God calls us to be peacemakers, and we should be discerning about our view on when war is necessary.
The Bible addresses war. In the Old Testament, God sometimes used war as a tool for justice against evil nations (Deuteronomy 20:17–18; 1 Samuel 15:1–3). His mercy is also seen in giving evil nations time to repent (Genesis 15:16). Too, there is a provision in the Mosaic law for the Israelites to offer peace to enemy nations (Deuteronomy 20:10). While war is described in terms of spiritual warfare rather than physical warfare in the New Testament (2 Corinthians 10:3–5; Ephesians 6:12), it also assumes that there will be wars in this world (Matthew 24:6–7). Despite this, God calls believers to be peacemakers and to live in peace as much as it depends on us (Romans 12:18). Ultimately, there are three approaches to war: activism, pacifism, or selectivism. It appears that selectivism is the view that best aligns with biblical principles, defending the innocent and upholding justice.
Normally when a person asks what the Bible says concerning war, the questioner typically wants to know whether it is right to participate in war. There are basically three views constructed to answer the question:
1. Activism – Christians should participate in all wars entered into by their government
2. Pacifism – Christians should not participate in war because it involves the killing of people
3. Selectivism – Christians should participate in "just wars"
Activism says that government has been ordained by God and that to disobey one's government (and its command to go to war), is disobeying God. The standard set of verses cited to support this view is: "Let every person be subject to the governing authorities. For there is no authority except from God, and those that exist have been instituted by God. Therefore whoever resists the authorities resists what God has appointed, and those who resist will incur judgment" (Romans 13:1–2). Scripture appears to reject the concept of total activism. There are numerous Biblical cases of believers disobeying government when its commands are contrary to God's moral laws (e.g. Daniel, Peter, and John). History also appears to demonstrate the rejection of activism. For example, the Nuremberg trials showcased that blindly obeying the government is no excuse for taking the lives of innocents.
Pacifism generally puts forth three arguments. First, they wrongly quote the eighth commandment as "you shall not kill," when the actual verse says "you shall not
murder
," which is different (Exodus 20:13). The pacifist also usually quotes one of Jesus' Sermon on the Mount statements: "But I say to you, Do not resist the one who is evil. But if anyone slaps you on the right cheek, turn to him the other also" (Matthew 5:39). In doing this, the pacifist fails to realize: (1) the slap on the face in the first century was an insult and not a threat of bodily harm, death, or confiscation of freedom or personal goods, and (2) it is a command directed to individuals and not nations. Lastly, the pacifist says that war is always based on greed, in one form or another. But history shows this to be false. As an example, the United States did not enter World War II because of greed but because the country was attacked and because its allies were being threatened with loss of life, freedom, and property from several dictators.
Selectivism says that Christians should participate in what is called a "just war". There is no single verse in Scripture that defines a "just war," however an attempt at a definition would be a war that:
• Is fought in the defense of the innocent
• Is fought to execute justice
• Is fought by a just government
• Is fought in a just manner (e.g. no children strapped with bombs)
There are a number of biblical examples that appear to support the just war concept. For example, Abraham's battle against the kings of Genesis 14 (and his blessing by Melchizedek) lends support to the conclusion that unjust national aggressors should be resisted and fought.