Religion helps to unite people Historians have divided human history into two periods:The Pre-historic era and The Historic era. The Pre-historic era refers to the time when human did not have proper writing or a developed education system and facilities, while The Historic-era refers to well developed and more educated human lives. Although people from both eras are differentthey have the same beliefs which we call religion. Since surrounded environment have been developed, new religions are also increasing and expanding in number of believers. The estimate numbers of existed religions are four thousand two hundred which leads by Christianity, Islam, Hinduism and Buddhism. Nowadays, the believers are increasing significantly, even almost everything which was once known as supernatural such as thunder, disaster or disease could be proved by science. Religions have been promoted as a powerful psychological tool to heal people’s sadness and give a reason of living or encourage for the one who want, which science or medicine cannot help. Religions created by the founders and follows by people who believe and agree in the same things. Therefore, religions help to create societies and group similar people together. With the similar characteristic and believing among people in a same religion and in some religions also count the believers as a same big family or brotherhood, so they are likely to be sympathetic and help each other. The result of the helping, praying and doing activities together create a unity between them. Mahatma Gandhi used Hindu's dogma of nonviolence to gather people for independence movement in India. The power of unity among Indian helped them get independence from England in finally. According to the development of this era, scientists try to prove everything with evidences which is contrast with the believing in supernatural, ghost or goddess of some religions. When members are no longer believed, they quit and would not group with other members again, so the religions would not play an important role to unite people anymore. Beside, many new born religions or doctrines come from the adjustment of existed religions’ credo. It shown that people who do not have same beliefs want to be separated. Worse is argument between different religions’ members which have almost different credo. This situation creates hatred between the groups and could become a big war. The famous war was The Crusade. It was the fighting between Muslims and Christians to be an owner of a holy land. The war took almost three centuries, many people were killed and suffered for the loss. Although there are different believing and rules of each religions their main purpose are the same, that is, to unite people and help them to be a real human by have kindness and ethical minded. The confusion, fighting, war and competing to be number one are created by egotism member. Ethical and human right must be tough to young people more than a credo or just grouping with only one group of similar beliefs. Thus, they will grow up to be reasonable adults who know how to behave to each other, no matter believes in science or god, same or different religions.