The concept of religion is an umbrella term for a variety of practices and beliefs that people identify with. These beliefs and practices are usually centered around the existence of God or an ultimate principle. In essence, religion is a system of agreed-upon beliefs about the nature of the universe. Religions can be internal or external, depending on their nature.
The numbers of people identifying with a particular religion vary widely. There are those who do not identify as religious at all but who believe that God exists. These individuals tend to have less intense beliefs than those who practice a specific religion. They are more likely to identify with polytheism than with a specific religion.
Religions may have many benefits and are also powerful ideologies. They serve as a source of social support, meaning, and incentives for good living. However, religions that are too rigid may lose their social value. Such religions may become self-serving institutions and powerful ideologies of oppression. They often promote fear and anxiety.
Religions have deep histories and are rooted in doctrine, rituals, and creed. Their members follow certain laws and conduct their lives according to their beliefs. They are also a source of inspiration for art and literature.