Religion is a social institution that involves a unified system of beliefs and practices relative to sacred things. It typically defines both the spiritual world (the realm beyond the physical) and the spiritual forces (entities or powers) that are believed to influence human life. These definitions provide a framework for understanding existence and guiding moral behavior within a community.

In postindustrial cities, the shift toward a service-based economy and increased globalization often leads to greater cultural and religious pluralism. As traditional social structures weaken, individuals are exposed to a wider variety of belief systems, resulting in the fragmentation of dominant religious institutions and a higher degree of openness toward new or alternative religious faiths.

An ecclesia is a religious organization that is well-integrated into the dominant culture and often serves as the state religion. In such systems, the church and the state are closely linked, with the religious institution providing legitimacy to the political order, while the political system supports the religious institution's influence over the population.

Functionalists, such as Émile Durkheim, argue that religion serves essential functions for the maintenance of society as a whole. These functions include promoting social cohesion, providing moral guidance, and offering meaning to life, which collectively help to stabilize the social order and ensure the continuity of societal values.

Dharma is a foundational concept in Hinduism that encompasses duty, virtue, morality, and the cosmic order. It dictates the appropriate way of living for individuals based on their stage of life and social position. By following Dharma, practitioners aim to maintain harmony within themselves and the universe, making it the essential ethical framework for Hindu religious and social life.

The Quran is the central religious text of Islam, which Muslims believe to be a revelation from God. While Islam recognizes other scriptures like the Torah (Tawrat), Psalms (Zaboor), and Gospel (Injeel) as having been revealed by God, the Quran is the final and primary authority for Muslims.

The 14th Dalai Lama, Tenzin Gyatso, is globally recognized as the primary spiritual leader of Tibetan Buddhism. He has played a pivotal role in bringing Tibetan Buddhist philosophy and practices to the international stage, advocating for peace, compassion, and interfaith dialogue throughout his long tenure as the exiled leader of the Tibetan people.

Communalism is an ideology that emphasizes the interests of one's own religious community over the broader national interest. It often leads to social friction and political polarization when different religious groups perceive their interests as inherently opposed to others.

Totemism is a religious or spiritual system in which a group of people identifies with a specific natural object, animal, or plant, known as a totem. This totem is considered sacred and is believed to have a mystical relationship with the group. It serves as a symbol of social cohesion and identity, reflecting the deep-seated human desire to find meaning and connection within the natural world.

Liberation theology is a movement that emerged primarily within the Catholic Church in Latin America during the 20th century. It emphasizes the role of the church in addressing poverty, social injustice, and political oppression. Proponents argue that religious faith should be expressed through active engagement in social reform and the empowerment of the marginalized, effectively merging spiritual teachings with a commitment to social and economic justice for the poor.