0 A High-Level Overview of Islam

Islam is one of the world’s major monotheistic religions and is the second-largest religion globally after Christianity.

It emerged in the early 7th century CE in the Arabian Peninsula, specifically in the cities of Mecca and Medina, located in present-day Saudi Arabia. The year 610 CE is traditionally dated as the time when Muhammad, a merchant from Mecca, received his first revelation from God through the angel Gabriel. These revelations continued for approximately 23 years until Muhammad’s death in 632 CE and were later compiled into the Qur’an, Islam’s central sacred text.

Today, Islam has approximately 2 billion followers, known as Muslims, representing about one quarter of the world’s population. Islam is the fastest-growing major religion in the world, largely due to higher birth rates in Muslim-majority regions rather than conversion alone.

Muslims live on every continent, with the largest populations found in South and Southeast Asia, the Middle East, North Africa, and Sub-Saharan Africa. Indonesia has the largest Muslim population of any single country, followed by Pakistan, India, and Bangladesh.

At its core, Islam is a strictly monotheistic religion. Muslims worship one God, called Allah in Arabic, which simply means “The God” and is linguistically related to the Hebrew word Eloah.

Eloah is a Hebrew word for “God.” It is an older, less frequently used singular form that appears primarily in the Hebrew Bible (Tanakh).

Islam teaches that this same God revealed Himself earlier through prophets such as Adam, Noah, Abraham, Moses, and Jesus. Muhammad is regarded as the final prophet in this line, bringing the last and complete revelation for humanity. Because of this, Islam sees itself as standing in continuity with Judaism and Christianity, while also correcting what it understands to be theological errors that developed over time.

Islam is both a religion and a comprehensive way of life. In addition to beliefs about God, prophets, scripture, and the afterlife, Islam provides guidance on personal conduct, family life, economics, social justice, and law.

These guidelines are drawn primarily from the Qur’an and from the Hadith, which are recorded reports of the sayings and actions of Muhammad. Together, these sources shape Islamic theology, ethics, and legal traditions.

Within Islam, there is diversity in interpretation, practice, and culture. The two largest branches are Sunni Islam, which represents about 85–90% of Muslims, and Shia Islam, which makes up most of the remaining population.

These divisions developed early in Islamic history and are primarily related to questions of leadership after Muhammad’s death. Despite internal diversity, Muslims across the world share core beliefs, rituals, and reverence for the Qur’an.

In the modern world, Islam plays a significant role in global politics, culture, and international relations, particularly in regions where Muslims form the majority population.

At the same time, most Muslims live ordinary lives focused on family, work, education, and worship, with daily religious practices integrated into a wide range of cultural contexts.