Introduction: The Paradox of Modern Religion

One of the great assumptions of modern Western culture is that human beings naturally move toward greater freedom.

As societies become wealthier, more educated and more individualistic, traditional constraints are expected to weaken. Religious authority declines. Social obligations loosen. Personal autonomy expands.

In many Western nations, this prediction appears to have been correct. Church attendance has declined sharply. Religious affiliation has fallen. Large numbers of people now identify as having no religious belief or no religious affiliation at all.

Yet at the same time, one of the great religious stories of the modern era has been the persistence and expansion of Islam.

Islam has grown into one of the world's largest religions. Muslim communities have expanded across Europe, North America, Australia and parts of Asia. In many countries where Christianity was historically dominant, Islam has become an increasingly visible social and cultural force.

This creates an intriguing question.

If modern Western values increasingly prioritise individual freedom, personal choice and liberation from traditional authority, why do many people continue to find attraction in a religion that places substantial obligations on believers?

Islam requires submission to God. It establishes daily prayer. It requires fasting for an entire month each year. It places significant emphasis on family obligations, sexual ethics, modesty, charity and community identity.

From a secular Western perspective, many of these demands appear restrictive. Yet they do not necessarily repel people, they often attract them.

The deeper question, therefore, is not simply why Islam grows and Christianity declines. The deeper question is:

Do human beings actually flourish with unlimited freedom, or do they require structure, boundaries, obligation and belonging?

And if people naturally seek those things, what happens when one religious tradition continues to offer them with confidence, while another increasingly struggles to articulate them?

Two Religions, One Human Need

At the level of broad social function, Christianity and Islam share many similarities.

Both are Abrahamic monotheistic religions. Both claim that humanity is accountable to a transcendent Creator. Both reject moral relativism. Both teach that human beings are not autonomous creatures who determine their own moral reality.

Both place importance on:

The Qur'an instructs Muslims:

"O you who believe, fasting has been prescribed for you as it was prescribed for those before you, that you may become righteous."

— Qur'an 2:183

Christianity similarly teaches spiritual discipline through practices such as prayer, fasting and sacrifice.

Jesus states:

"Whoever wants to be my disciple must deny themselves and take up their cross and follow me."

— Matthew 16:24

Both traditions therefore reject the idea that human flourishing comes purely from satisfying personal desires.

Both argue that human beings become better through submission to something higher than themselves.

This is a significant point because much of modern Western culture has moved in the opposite direction.

The dominant cultural message is often:

But human beings throughout history have rarely lived this way.

Sociologists and psychologists have repeatedly observed that people need more than freedom. They need meaning, identity and belonging.

The sociologist Émile Durkheim argued that religion functions as a mechanism of social cohesion. Communities survive because members share beliefs, rituals and obligations.

Jonathan Haidt, in his work on moral psychology, argues that human beings are not merely rational individuals seeking personal advantage. We are social creatures shaped by loyalty, authority, tradition and sacred values.

Joseph Henrich's research into cultural evolution suggests that successful societies often develop institutions that encourage cooperation through shared norms and costly commitments.

The key phrase is costly commitment.

A belief becomes more meaningful when it requires something from us. A marriage means something because it requires sacrifice. A military oath means something because it demands loyalty under pressure. A religious commitment means something because it changes behaviour.

The paradox is that the very things modern societies often attempt to minimise—obligation, discipline and restraint—may be precisely the things that create deep belonging.

The Difference Between Belief and Submission

The most significant difference between Christianity and Islam is not that one has morality and the other does not.

Both have moral systems, but the difference lies in how those moral systems are conceptualised and implemented.

The word "Islam" itself derives from the Arabic root associated with submission. The believer submits to the will of Allah.

The Qur'an states:

"The religion with Allah is Islam."

— Qur'an 3:19

The ideal believer is one who submits.

Christianity also contains the concept of submission, but it is generally framed through relationship, grace and transformation.

Jesus teaches:

"Love the Lord your God with all your heart and with all your soul and with all your mind."

— Matthew 22:37

The Christian ideal is often expressed as reconciliation with God through Christ. The Islamic ideal is often expressed as obedience and submission to God. This distinction influences how religious obligations are experienced.

In many Islamic communities, religion is not simply a private belief system. It is a comprehensive framework governing daily life.

Prayer occurs five times daily. Ramadan restructures an entire month around fasting and spiritual reflection. Dietary practices distinguish believers. Family expectations are strongly defined. Religious identity is often connected with community identity.

For many Muslims, this provides a complete framework for living. The believer does not need to constantly negotiate moral uncertainty because the framework already exists.

This is precisely the feature that many secular Western observers find uncomfortable. But it may also be the feature that many people find attractive.

The Cost of Certainty: What the Rise of Islam and the Decline of Western Christianity Reveal About Human Nature

Law, Authority and the Desire for a Complete Way of Life

One of the most significant differences between Christianity and Islam concerns the relationship between faith and social order.

Islam developed historically not only as a theology but also as a civilisation. From its earliest centuries, Islamic thought addressed questions of worship, family, commerce, law and governance. The concept of Sharia—literally "the path" or "the way"—represents the broader Islamic framework for living according to God's guidance.

However, it is important to recognise that Sharia is not a single uniform legal code applied identically everywhere. Across history, Islamic scholars, schools of jurisprudence and governments have interpreted and implemented it differently. For some Muslims, Sharia primarily represents personal religious ethics. In other contexts, it has been incorporated into state law.

The underlying principle, however, is distinctive:

Human life is not divided neatly into a religious sphere and a secular sphere.

Faith provides a comprehensive framework.

The Qur'an states:

"And whoever does not judge by what Allah has revealed—then it is those who are the disbelievers."

— Qur'an 5:44

Historically, many Islamic thinkers understood this as affirming the importance of divine guidance extending beyond private belief.

Christianity developed differently, although the history is more complicated than the modern phrase "separation of church and state" suggests.

Jesus famously stated:

"Render to Caesar what is Caesar's, and to God what is God's."

— Matthew 22:21

This verse has often been interpreted as supporting a distinction between earthly political authority and spiritual authority.

The New Testament also states:

"Let everyone be subject to the governing authorities, for there is no authority except that which God has established."

— Romans 13:1

Christianity therefore developed a tradition in which the church and state could be related but were not necessarily identical.

The difference is not that one tradition has rules and the other does not. Both do.

The difference is where ultimate authority is located and how directly religious principles are expected to shape public life. This distinction becomes particularly important in a modern Western context.

Modern liberal societies are built around pluralism. They assume citizens with different beliefs can coexist under a common secular legal framework. Religions that make universal claims about truth inevitably create tension with this model.

The question is not whether one system is good or bad. (Though, a subject for another day, both can't be right.)

The question is whether human beings are ultimately more attracted to maximum individual autonomy or to systems that provide comprehensive answers. The evidence suggests that many people want both freedom and certainty—but when forced to choose, certainty often has powerful appeal.

The Question of Jihad and Extreme Commitment

Any serious comparison between Christianity and Islam must address one of the most controversial subjects surrounding Islam: jihad.

The word itself means "struggle" or "striving" and has multiple interpretations within Islamic traditions. Many Muslims understand jihad primarily as an internal spiritual struggle to live faithfully. Others use the term in reference to armed struggle under particular conditions.

The complexity arises because Islamic texts contain passages dealing explicitly with warfare.

For example:

"Fight those who do not believe in Allah or in the Last Day..."

— Qur'an 9:29

Another commonly cited passage states:

"And when the sacred months have passed, then kill the polytheists wherever you find them..."

— Qur'an 9:5

There are also hadith traditions frequently cited in discussions about warfare and apostasy.

For example, a hadith recorded in Sahih al-Bukhari states:

"I have been commanded to fight the people until they say: None has the right to be worshipped but Allah..."

These passages have been interpreted differently throughout Islamic history.

Classical Islamic jurists developed sophisticated theories about warfare, treaties, protected minorities and legitimate authority. Contemporary Muslim scholars disagree substantially about how these texts apply today.

Some argue these verses refer to specific historical conflicts. Others argue that they establish broader principles regarding relations between Muslims and non-Muslim political powers. The important point for this essay is not to determine which interpretation is correct.

The important point is this:

The existence of texts and traditions that demand extraordinary levels of commitment demonstrates that religion can motivate behaviour far beyond ordinary personal preference.

This is true not only in Islam. Human beings have always demonstrated willingness to make enormous sacrifices for causes they consider sacred. People die for countries. People die for political ideologies.People sacrifice wealth, comfort and even personal safety for movements that give their lives meaning.

The existence of extremist groups that justify suicide attacks in religious terms is therefore evidence of a broader human phenomenon: the power of sacred commitment.

I am not suggesting it is evidence that all Muslims support such actions, although many clearly do. It is evidence that deeply held beliefs can produce extraordinary commitment - to an extent that boggles the Western mind.

That is the phenomenon worth examining. Because the question remains: Why does a worldview demanding sacrifice often produce stronger commitment than one demanding less?

The High-Cost Religion Paradox

One of the great assumptions of modern Western thought is that reducing demands makes institutions more attractive.

Yet many successful institutions operate according to the opposite principle. They demand commitment. Elite military units do not create cohesion by telling members:"Do whatever feels right." They create cohesion through discipline, shared hardship and sacrifice.

Professional athletes do not achieve excellence through unlimited freedom. They achieve it through demanding routines.

Strong families are not built only on affection. They are built on duty, sacrifice and obligation.

Religious communities often operate in the same way.

The anthropologist Richard Sosis studied religious communities and found that groups requiring costly commitments often demonstrated greater cohesion and longevity.

The reason is straightforward.

If membership requires nothing, membership means little.

A person who changes their diet, schedule, clothing, relationships and behaviour because of a belief is demonstrating commitment not only to others but to themselves. The sacrifice reinforces identity. This may explain why some highly demanding religious communities remain resilient.

The Amish, Orthodox Jewish communities, conservative Christian groups and traditional Muslim communities all demonstrate variations of this principle, albeit not as extremely as Islam.

They preserve boundaries. They maintain rituals and create strong internal identity.They transmit beliefs across generations.

The modern West has often viewed boundaries as oppressive. But boundaries are also what create identity.

1When everything is accepted, nothing is distinctive.

Christianity's Contemporary Challenge: Grace Without Gravity

This brings us to the uncomfortable question for Christianity.

Has Christianity, particularly in Western societies, weakened itself by reducing the demands of discipleship?

This is not a criticism of Christianity itself. The New Testament contains profound teachings about grace, mercy and forgiveness. Jesus repeatedly demonstrated compassion toward outsiders and sinners. However, the same Jesus also spoke extensively about judgment, sacrifice and obedience.

He stated:

"Not everyone who says to me, 'Lord, Lord,' will enter the kingdom of heaven, but only the one who does the will of my Father."

— Matthew 7:21

And:

"If anyone would come after me, let him deny himself and take up his cross and follow me."

— Matthew 16:24

The historical Christian message contained both grace and obligation. Forgiveness and repentance. Love and truth. Mercy and judgment.

The argument made by some critics of contemporary Western Christianity - including me -  is that the balance has shifted.

Some churches have moved toward what sociologist Christian Smith described as Moralistic Therapeutic Deism: a version of religion focused primarily on being nice, feeling good and receiving support from a distant God.

In some expressions of Christianity, the central message has become: God loves you. You are accepted. You are valued. And nothing is else is required.

These are true Christian ideas, but without the accompanying concepts of repentance, transformation, discipline and holiness, Christianity risks becoming indistinguishable from secular self-help.

The prosperity gospel represents another controversial development. Some megachurch movements emphasise:

The danger is that Christianity becomes a product designed around consumer desires rather than a demanding path of transformation.

A religion that asks nothing difficult of people may struggle to inspire deep commitment.

The Real Battle Is Not Between Religions, But Between Meaning and Meaninglessness

The deepest issue is not Islam versus Christianity, but religion versus secular modernity. The growth of atheism and secularism in the West has created societies with unprecedented personal freedom.

But freedom creates a challenge. Freedom answers the question: "What can I choose?" It does not necessarily answer: "What should I choose?"

Human beings require more than options. They require meaning and narratives larger than themselves. They require communities that tell them that you belong,  you matter and your life has purpose. You are responsible for something greater than your own happiness.

Religions have historically provided those answers.

The challenge for Christianity is not simply competing with Islam. The challenge is recovering confidence in its own message.

A faith that apologises for having convictions will struggle against faiths that confidently express theirs. A community that refuses to define itself will struggle against communities with clear identity. A religion that offers only comfort may struggle against religions that offer transformation.

The future may belong not to the least demanding belief system, but to those capable of answering the deepest human questions with clarity and conviction.

The question Christianity must therefore confront is not: "How can we become more acceptable to modern culture?"

It is: "Do we still believe we have something worth sacrificing for?"

Because history suggests that human beings do not only seek freedom. They seek something worthy of their devotion.

And when one institution stops offering that, another eventually will, and if that is Islam, it is not only an indictment of modern Christianity, it is our just desserts.