Weapons of Mass Destruction & Peacemaking
Nuclear Weapons and Weapons of Mass Destruction
Weapons of mass destruction (WMDs) are weapons that can kill huge numbers of people and cause devastation over a wide area. The three main types are nuclear weapons, biological weapons (using disease) and chemical weapons (using poisonous substances). The use of WMDs is one of the most controversial moral issues in modern warfare.
Nuclear weapons are the most powerful WMDs ever created. The atomic bombs dropped on Hiroshima and Nagasaki in 1945 killed over 200,000 people, many of them civilians. The long-term effects included radiation sickness, birth defects and environmental destruction that lasted for decades. Today, several countries possess nuclear arsenals, and the threat of nuclear war remains a global concern.
Nuclear weapons violate several criteria of the just war theory: they cannot be used proportionately (their destructive power is too great), they inevitably target civilians (blast radius is indiscriminate), and their long-term effects (radiation, environmental damage) extend far beyond the battlefield. For these reasons, most religious believers oppose their use.
Nuclear Deterrence
Nuclear deterrence is the idea that possessing nuclear weapons prevents war because no nation would risk attacking a country that could retaliate with nuclear force. This was the basis of the Cold War strategy of “mutually assured destruction” (MAD) — if both sides would be destroyed, neither side would start a war.
Arguments for deterrence: Nuclear weapons have arguably prevented major wars between nuclear powers since 1945. The threat of mutual destruction makes war too costly to consider. Some argue that giving up nuclear weapons unilaterally would leave a country vulnerable to attack or nuclear blackmail.
Arguments against deterrence: The threat to use weapons that would kill millions of civilians is itself immoral. Deterrence relies on the willingness to commit mass murder, which contradicts the sanctity of life. Accidents, miscalculations or rogue states could lead to nuclear war regardless of deterrence. The money spent on nuclear weapons could be used to address poverty and suffering.
Contrasting Beliefs on WMDs
Christianity: Most Christian denominations oppose the use of nuclear weapons. The Catholic Church has called for complete nuclear disarmament, and Pope Francis has stated that even the possession of nuclear weapons is “to be condemned.” Jesus’s teaching to “love your enemies” (Matthew 5:44) and the principle of sanctity of life make the mass killing caused by nuclear weapons incompatible with Christian ethics. However, some Christians support nuclear deterrence as a way of preventing war, arguing that the intention is peace, not destruction.
Islam: The Qur’an teaches that war must be proportionate — “If you have to respond to an attack, make your response proportionate” (Qur’an). Nuclear weapons are inherently disproportionate and indiscriminate, violating this principle. Islam also forbids the killing of innocent civilians, which makes the use of WMDs incompatible with Islamic teachings. However, some Muslim-majority countries possess nuclear weapons, arguing that deterrence protects their people from aggression.
Both Christianity and Islam oppose the use of weapons of mass destruction. The key area of debate is possession for deterrence. Some believers argue that possessing nuclear weapons prevents greater harm; others argue that even the threat of using them is morally wrong because it relies on the willingness to kill millions of innocent people.
Peacemaking and the Work of Individuals
Religious teachings have inspired many individuals and organisations to work for peace. Peacemaking involves actively working to resolve conflicts, support victims and prevent future violence. Both Christianity and Islam teach that believers have a duty to pursue peace.
Desmond Tutu was an Anglican archbishop in South Africa who led the fight against apartheid through peaceful means. Inspired by Jesus’s teachings on love and reconciliation, he chaired the Truth and Reconciliation Commission after apartheid ended, helping victims and perpetrators to find a path to forgiveness. He won the Nobel Peace Prize in 1984.
Malala Yousafzai, a Muslim from Pakistan, campaigned for girls’ right to education despite death threats from the Taliban. After being shot in the head in 2012, she continued her work, saying: “With guns you can kill terrorists, with education you can kill terrorism.” Her faith in Allah’s plan sustained her through her recovery. She became the youngest-ever Nobel Peace Prize laureate in 2014.
Religious Responses to Victims of War
Religious organisations play a vital role in supporting victims of war around the world. They provide humanitarian aid, shelter, medical care, education and emotional support to refugees and displaced people.
Islamic Relief Worldwide was founded in Birmingham, UK, in 1984. Inspired by the Islamic principle of zakah (charitable giving), it provides emergency relief and long-term development support to victims of war and conflict worldwide. In recent years, it has responded to crises in Syria, Yemen, Gaza and Afghanistan, providing food, clean water, medical care and shelter to millions of displaced people.
Islamic Relief’s work is motivated by the Qur’anic teaching: “Whoever saves a life, it is as if he has saved the whole of humanity” (5:32). The organisation works across religious boundaries, helping people of all faiths and none. This reflects the Islamic belief in the universal value of human life and the duty to help those in need, regardless of their background.
Other religious organisations involved in supporting victims of war include Christian Aid, CAFOD (Catholic Agency for Overseas Development) and Muslim Aid, a British Muslim charity that supports people affected by conflict. These organisations demonstrate that religious teachings on peace, justice and compassion are not just theoretical — they inspire practical action to help those suffering from the effects of conflict.