What is unfolding across the world today? At its heart lies a conflict not merely between faiths, but between systems that allow voluntary belief and one that fuses religion with political control, demanding submission from all.

This article focuses on Islam—one of history’s youngest and currently fastest-growing major faiths—examining whether it operates more as a political movement than a traditional religion, and how its historical and ongoing expansion places it in tension with the world’s other belief systems.

Before and After Muhammad

In 570 CE, Arabia was home to roughly one million people—pagans, Jews, Christians, and tribal polytheists. Islam did not exist. By Muhammad’s death in 632 CE, the entire peninsula had come under Islamic dominance, with only scattered remnants of Christians and Jews remaining.

Muhammad’s early base in Medina began small. He assembled raiders to target caravans, amassing wealth and an army fueled by vengeance against his Meccan rejectors. Victories brought spoils, including enslaved women and children, exemption from tax for those who converted, elevated social status, and the promise of paradise for those martyred for Allah’s cause. These powerful incentives for alignment—material, social, and spiritual—drove rapid growth far more effectively than spiritual persuasion alone. He cast the effort in religious terms: total submission to Allah, loyalty to the Prophet, standardized prayer (shifting from Jerusalem to Mecca to distinguish from Jewish practice), and emphasis on the Kaaba and Ishmael’s lineage over Isaac’s.

Conquest, plunder, the jizya tax on non-Muslims, and promises of paradise for fighters drove rapid growth. By his death, Islam had become the dominant political-religious order in Arabia. This was expansion through military and economic means, framed as a divine mandate—not a spontaneous spiritual awakening.

Christianity’s Contrast

Christianity emerged as a small Jewish sect in the first century CE. Following Jesus’ death and reported resurrection, and the Temple’s destruction in 70 CE, apostles spread the message through persuasion, personal conviction, and eyewitness testimony. They proclaimed universal salvation by grace, without systematic coercion. Many apostles and early believers died as martyrs, yet the faith expanded steadily via social networks and ethical appeal.

Scholars characterize its early growth as largely voluntary and exponential. By around 600 CE, in a world of roughly 200–250 million people, Christians numbered in the millions, forming majorities in parts of the Byzantine Empire.

Judaism remained primarily an ethnic and national faith, growing through natural increase and endogamy rather than aggressive proselytizing; its population in the early seventh century likely stood at 1–3 million. 

Zoroastrianism, the Sasanian state religion (Persia) with millions of adherents at its peak, stressed ethical principles but was not missionary-driven.

Islam’s Military and Demographic Expansion

After Muhammad’s death, Islam expanded territorially using its militant army and proxies with extraordinary speed, forging an empire from Spain to India within a century. Actual conversions among conquered populations unfolded more gradually—over centuries—through incentives, social pressure, and structural disadvantages imposed on conquered non-Muslims (dhimmis).  The handicapped and others without a purpose or useful, as not to burden society, were simply eliminated.

Christians and Jews, the People of the Book, their communities overtaken, the most influential often dispensed with, retained protected but subordinate status, paying the jizya (often collected in humiliating fashion).  They faced restrictions on new places of worship, public preaching, and legal equality. Children of captives or mixed unions were raised Muslim. 

Apostasy from Islam carried severe penalties, including death—a rule solidified during the Ridda Wars shortly after Muhammad’s death, when the first caliph crushed those attempting to exit the faith. This doctrine has persisted: as of 2025–2026, apostasy remains punishable by death (at least in theory, and sometimes in practice) in countries including Iran, Saudi Arabia, Afghanistan, and others.

Zoroastrians in Persia suffered the steepest decline due to temple destruction and intense pressure. Christian majorities in the Levant, Egypt, and North Africa eroded over 3–4 centuries into minorities. The environment was asymmetric: Islamic institutions dominated public space, alternative religious materials were curtailed, conversion to Islam offered economic and social relief, while leaving it invited punishment. Historians note that while immediate mass forced conversions were not always the norm early on (caliphs benefited from taxing a large non-Muslim base), the cumulative effects of dhimmitude, cultural Arabization, and network effects produced profound demographic and cultural shifts. Arabic became the language of governance, commerce, law, and study (scholarship), displacing local languages and literary traditions. Non-Muslims increasingly adopted Arab names, dress, and customs simply to participate fully in daily life and advance socially. At the same time, network effects created a self-reinforcing cycle: as Muslim communities grew, intermarriage, business partnerships, friendships, and social acceptance all flowed more easily through Muslim networks, while non-Muslim communities became progressively isolated and disadvantaged.  Islamic/Arabic norms dominated public life, making it harder for alternative traditions to thrive. 

The main theaters of early Islamic expansion were Arabia, the Levant, Persia, North Africa, and Byzantium.

It must be noted that as the number of Muslims increase in societies to which they have emigrated, in western countries, religious and cultural factors tied to Islam often slow full cultural integration more than for many other immigrant groups. High fertility rates and chain migration amplify demographic concentration, which can reinforce separatism rather than blending. They then vote as a block, are less diverse in their hiring practices, and associate only with their own. And when they are the conqueror, or become more prominent in society, they subject non-Muslims to live by their standards, and to become part of their culture to have any opportunity at acceptance or advancement.  While individual outcomes vary and many Muslims contribute positively in their new environments, the pattern raises legitimate questions about compatibility with liberal, pluralistic societies that prioritize voluntary integration and equal individual rights.

In the Indian subcontinent, home to the ancient and largely non-missionary Hindu tradition, Islam arrived later—through early trade contacts in the south and military conquests from the 8th century onward, leading to sultanates and the Mughal Empire. Conversions occurred through a combination of warfare and temple destruction in some periods, jizya incentives, Sufi appeal (especially to lower castes seeking escape from the Hindu social order), and gradual cultural pressures, resulting in today’s large Muslim populations across Pakistan, Bangladesh, and India while Hinduism retained majority status in the core region.

Islam’s growth thus combined swift conquest with sustained, top-down pressure (coercion) to convert—distinct from Christianity’s predominantly bottom-up expansion through (voluntary) conviction.

It is difficult to accept an Islamist that claims Islam is not aggressive.

Freedom Under Islam

Islam emphasizes submission—not only to Allah, but to those empowered to interpret and enforce His commands. Freedom of conscience is sharply limited: the apostasy penalty binds individuals lifelong, and birth into a Muslim family (or as offspring of captives) cements affiliation. The often-quoted “no compulsion in religion” (Quran 2:256) stands alongside verses like 9:29, which direct fighting non-believers until they submit and pay jizya.

In many Muslim-majority societies today, religious education focuses almost exclusively on Islam, while in the West, declining standards in religious literacy leave many unaware of this history. Sanitized narratives obscure the legacy of coercion. Politicians, attuned to growing demographic blocs, sometimes accommodate voices prioritizing sharia elements over classical liberal norms.

Recent data underscores the stakes. As of 2026, with the global population at approximately 8.3 billion, Muslims number roughly 1.91–2.0 billion—about 24–25% of humanity—making Islam the fastest-growing major religion. This growth is driven primarily by higher birth rates and a youthful demographic profile, with secondary contributions from conversions in certain regions. Christians remain the largest group at around 2.38 billion, though their share of the world population is gradually declining. Hinduism follows with approximately 1.16 billion adherents, while the religiously unaffiliated (“nones”) number around 1.2 billion. Other faiths constitute smaller shares.

Projections from sources such as Pew Research indicate that Muslims could approach numerical parity with Christians by mid-century and continue gaining ground thereafter, outpacing most other groups through sustained fertility advantages and, in some areas, drawing from the growing pool of secular individuals (the “nones”). 

These demographic realities illustrate how, over 1,400 years, Islam has achieved remarkable expansion, winning the battle, the war—not chiefly through the free marketplace of ideas, but through a combination of conquest, structural incentives, high fertility, and cultural persistence, advancing under the false banner of religion while limiting genuine freedom of conscience.

The battle remains one of freedom: the right to believe, doubt, or change belief without coercion. Autocracies restrict liberty for power; Islam often does so under religious sanction, with the Quranic vision of ultimate dominion for Allah.

When Islam Prevails as the Victor: The Example of Iran

Iran after the 1979 Revolution offers a stark case study. Promises of liberation yielded theocratic control. Opposition was systematically eliminated, civilian firearms confiscated, and a morality police apparatus—including the Basij—empowered to enforce sharia. Women have faced punishment for minor dress violations; protests have repeatedly met lethal force. As recently as late 2025 and January 2026, widespread economic and freedom protests were crushed with live ammunition, mass arrests, internet blackouts, and hundreds to thousands of deaths, with the IRGC and Basij at the forefront. Propaganda and surveillance maintain the regime’s narrative. What began with revolutionary hope solidified into authoritarian religious rule.

Conclusion

Let Iran stand as a warning to the world: it reveals what Islam has achieved historically through conquest and coercion, what it is capable of causing today, and what its’ classical doctrines envision for the future—unless it is firmly checked. 

Should Islam even be recognized as a religion in the same category as others? Most faiths present their gods as offering moral guidance or counsel that individuals may accept or reject voluntarily. Islam, by contrast, demands total submission enforced through human intermediaries who administer sharia, collect jizya and zakat, punish apostasy, and subordinate all other ways of life. It is this inescapable human political element—fusing divine command with state power—that sets it apart and renders it less a voluntary faith than a comprehensive system of control.

Islam is at war with the world—not every individual Muslim (many of whom live quietly as moderates without power), but with the ideological framework itself when pursued in its classical, totalizing form. In Muslim-majority settings, even democratic forms often bend toward those enforcing strict Quranic interpretations aimed at broader Islamic order. Recent Western examples, such as the elections and influence of figures like Ilhan Omar, Rashida Tlaib, and Zohran Mamdani (elected mayor of New York City in 2025), illustrate how demographic growth can translate into political leverage that sometimes challenges secular liberal norms.

This is not a conventional clash of religions. It is a contest between worldviews that protect voluntary faith—including the freedom to disbelieve or convert—and one that subordinates all else to submission and control. The driving forces—such as Iran’s Revolutionary Guard, its proxies, and aligned ideological networks—must be confronted clearly. Defending open societies, personal liberty, and the free marketplace of ideas requires honest reckoning with Islam’s history and present realities, not blanket animosity toward Muslims as individuals, but resolute resistance to coercive doctrine wherever it seeks dominance. 

Islam, as a totalizing political-religious doctrine poses a unique threat to global stability and personal liberty wherever it gains unchecked influence.  It must be resisted, not with blanket hared of Muslims, but with clear-eyed defense of freedom, truth, and the open marketplace of ideas. 

By Thomas W. Balderston

Author and Blogger