Importance of Religion to Society
Senior 4 · General and Religious Studies
Importance of Religion to Society
Lesson 3 of 4
40 min
Read this illustrative case. In one week, Aisha keeps the fast of Ramadan, as her faith requires. At her school, run by a Catholic diocese, she signs the school's code of conduct. On the way home, her uncle is stopped by the police for driving a motorcycle without a helmet. Three sets of rules: the law of her religion, the rules of a faith-based school, and the law of the State.
Which of them is "law"? Where did each come from, and what happens when two of them disagree? Religion has shaped law for thousands of years: three of the Ten Commandments (do not murder, do not steal, do not give false testimony) are also crimes in Rwanda today. Yet Rwanda's Constitution calls the country a secular republic. This lesson explains both facts.
Definition
Law: in Thomas Aquinas's classic definition, "an ordinance of reason for the common good, made by him who has care of the community, and promulgated" (made known).
Divine law: law believed to be revealed by God, for example in the Torah, the Gospels or the Qur'an.
Natural law: moral principles that human reason can discover from human nature, such as "do good and avoid evil" and "protect life".
Human (positive) law: law made by a human authority such as a parliament. Customary law: rules that come from a community's long-standing customs.
Canon law: the internal law of a church, especially the Catholic Church's Code of Canon Law (1983).
Sharia: "the way", the law of God in Islam as a whole. Fiqh: the human science of understanding and applying Sharia.
Secular state: a state that has no official religion and makes its laws by civil processes, while protecting the freedom of every religion. Theocracy: a state ruled in the name of God by religious leaders or religious law.
The thirteenth-century theologian Thomas Aquinas placed all law in one order, flowing from God.
| Kind of law | What it is | Example |
|---|---|---|
| Eternal law | God's wise plan for all creation | The order of nature |
| Natural law | "The rational creature's participation of the eternal law": what reason can know of it | Protect innocent life |
| Divine law | What God has revealed in scripture | "You shall not murder." (Exodus 20:13) |
| Human law | Laws made by rulers, which should apply natural law to a society's needs | A penal code; traffic rules |
For Aquinas, a human law that contradicts natural law is not truly law. This idea later supported the belief that every human being has rights that no government may take away. Christians also follow the internal law of their churches: the Catholic Church's Code of Canon Law governs its sacraments, clergy and property.

In Islam, Sharia covers worship, family life, trade, crime and ethics. Sunni scholars name four sources, used in order.
| Source | Meaning | How it is used |
|---|---|---|
| Qur'an | The word of God revealed to the Prophet Muhammad | The first and highest source |
| Sunnah | The words and actions of the Prophet, recorded in the hadith | Explains and applies the Qur'an |
| Ijma | Consensus of qualified scholars | Settles questions the texts do not answer directly |
| Qiyas | Analogy | Extends a ruling to a similar new case: the ban on wine is applied to other drinks and drugs that intoxicate, because the reason (loss of reason) is the same |
The Qur'an itself points to the first two sources and to obedience to rulers: "O ye who believe! Obey Allah, and obey the messenger and those of you who are in authority; and if ye have a dispute concerning any matter, refer it to Allah and the messenger" (Surah 4:59, Pickthall).
Both faiths teach respect for lawful authority. Jesus said: "Give therefore to Caesar the things that are Caesar's, and to God the things that are God's" (Matthew 22:21), and Paul wrote: "Let every soul be in subjection to the higher authorities" (Romans 13:1). Yet when a ruler commands what God forbids, the apostles answered: "We must obey God rather than men" (Acts 5:29). Religious law can therefore support state law, add to it, or, in rare cases, resist it in the name of conscience.
Figure 3 shows how the two kinds of law overlap.
Worked example: applying the four sources
A Muslim student asks whether a new energy drink containing a strong stimulant is permitted. No verse or hadith names the drink. A scholar reasons by qiyas: the Qur'an forbids wine; the Sunnah explains the reason as intoxication; if the drink intoxicates in the same way, the same ruling applies; if it does not, it is not forbidden for that reason. If the scholars of a time agree, their ijma settles the matter for the community. The method shows that religious law is not only a list of old rules: it has a reasoned way of facing new questions.
Warning
Common mistakes
Important
Discuss. Law N° 72 of 2018 forbids religious organisations to cause noise pollution and requires their legal representatives to hold a degree. Is this a fair limit on religious freedom, or too much control? Use Article 37 ("in accordance with the law") and Romans 13:1 or Surah 4:59 in your answer.
CrashCourse Philosophy #34: "Natural Law Theory", about 10 minutes. Note Aquinas's idea of basic human goods and how it links God, reason and law.
Practice
Key points
Sources and credits
Written by Ganzaa: the opening case, Figure 3, the tables, the worked example and the exercises.
This lesson adapts CC BY-SA material and is shared under CC BY-SA 4.0.
Quick check
Put the four sources of Sunni Islamic law in the order in which they are used.
Tap the cards in the right order.