Islam & Just War (Edexcel GCSE Religious Studies B): Revision Note

Exam code: 1RB0

Angela Yates

Written by: Angela Yates

Reviewed by: Bridgette Barrett

Updated on

Islam and the Conditions of a Just War

  • A just war is a war which can be considered justified because its aim and the methods used to fight are just

  • Just War theory is a set of conditions to help judge what should be considered ‘just’ or fair in the methods and outcomes of war 

  • These criteria have been in existence since the thirteenth century, and were adopted by the United Nations (UN) to become part of international law

Conditions for a Just War in Islam

  • There are strict rules about only fighting a war that is just in Islam, because the Qur’an teaches

‘Fight in the cause of Allah those who fight you but do not transgress limits.’ (Qur’an 2:190)

  • A war must be fought for a just cause:

    • To defend Islam if it is under attack

    • To stop injustice or protect the oppressed

    • In self-defence, not for aggression

 ‘To those against who war is made, permission is given to fight because they are wronged. (Qur’an 22:39)

  • It must be a last resort

    • All other peaceful solutions must have been tried

  • It must have authorised leadership

    • It must be declared by a Muslim religious leader, not a political one

    • It must have the support of the Muslim community, not just one person

  • It must have right intentions

    • It is not for gaining land or power

    • It is not to force people to convert to Islam

  • It must protect the innocent

    • Civilians, especially children, women, the elderly, and the sick, must not be harmed

‘Do not kill any child, any woman, or any elderly or sick person.’ (Hadith)

  • It must avoid environmental damage

    • It must not harm trees, crops, or animals

‘Do not spoil the cultivated fields and gardens.’ (Hadith)

  • It must end when peace is offered

    • Muslims must stop fighting as soon as the enemy seeks peace

‘But if the enemy inclines towards peace, do you also incline towards peace.’ (Qur’an 8:61)

  • A war must meet all of these conditions to be considered a just war

  • If a war does fulfil these conditions, then a Muslim must fight in it because:

    • The Qur’an says that Muslims must fight if they are attacked and this has ultimate authority as the revealed word of God

    • Muhammad (pbuh) fought in wars and Muslims should follow his example

    • There are many Hadith that say Muslims should fight in just wars

    • The Qur’an says that anyone who fights in a Just War will go straight to heaven 

‘to him who fights in the cause of Allah – whether he is slain or gets victory – soon shall We give him a reward of great value.’ (Qur’an 4:74)

Divergent Muslim Approaches to Just War

  • In practice, individual Muslims interpret the guidelines for a just war differently, which can make Just War Theory difficult to apply

  • Some Muslims believe that a just war is the ‘lesser jihad’ and so it is acceptable to protect the freedom of the Islamic faith against a threat

    • It is all part of a Muslim’s struggle in the cause of God

  • There are disagreements about the ‘legitimate authority’ that could sanction a just war

    • For Sunni Muslims, this would be a prophet or Khalifah

    • For Shi’a Muslims, it would be a prophet or one of the imams

  • Many Muslims would reject the conditions for lesser jihad as out-of-date

    • They were relevant at the time of the Prophet Muhammad (pbuh)

    • However, international laws and organisations such as the United Nations exist to protect their rights today

  • Many Muslims would say that a just war is never possible in the modern age

    • The criteria are too strict - you can never protect the innocent or avoid damage to the environment

    • Modern weapons are so powerful that it is simply impossible to adhere to these conditions

    • Others would point out that Islam is a religion of peace, therefore setting out conditions for a just war is a contradiction in terms

      • Violence breeds more violence and other methods should be used to achieve peace

Islam and Ethical Theories Surrounding Just War

Situation ethics and just war

  • Some Muslims may use ethical theories such as situation ethics to help them determine whether a war is just

  • They would look at the individual situation and ask what the most loving action would be

    • Would it be more unjust to fight the war than to allow the injustice to continue?

    • They would then act in a way that would be in most people’s best interests, even if that meant fighting the war

  • Many situation ethicists would point out that it would never be justifiable to use excessive force or weapons of mass destruction in any situation


Humanist attitude towards just war

  • Some humanists accept the Just War Theory as it is based on reason and moral values

  • Other humanists believe that it is impossible to have a just war because all human life is special

    • Even though they do not believe life came from God they still value it and would not support its destruction

    • Instead, they believe non-violent means should be used to try to achieve peace before war is considered

Worked Example


Outline three Muslim conditions of a Just War

(3 marks)

One condition Muslims have for a Just War is that it must be fought for a just cause (1 mark)

Another condition is that it must be a last resort (1 mark)

A third condition is that it must be authorised by a Muslim authority (1 mark)

Examiner Tips and Tricks

There are many similarities between just war and lesser jihad. Look at the section of these revision notes entitled Islam & Holy War to help you to understand these ideas in further detail.

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Angela Yates

Author: Angela Yates

Expertise: Religious Studies Content Creator

Angela graduated with a first-class degree in Theology and Religious Studies from the University of Manchester. After completing a PGCE and CCRS, she taught RE for around fifteen years before becoming a full-time writer and educational content creator. Angela is passionate about creating Religious Education resources to enable students to achieve their full potential.

Bridgette Barrett

Reviewer: Bridgette Barrett

Expertise: Geography, History, Religious Studies & Environmental Studies Subject Lead

After graduating with a degree in Geography, Bridgette completed a PGCE over 30 years ago. She later gained an MA Learning, Technology and Education from the University of Nottingham focussing on online learning. At a time when the study of geography has never been more important, Bridgette is passionate about creating content which supports students in achieving their potential in geography and builds their confidence.