Abrahamic religions teachings of Quran are presented as the direct revelation and words of Allah. Islam (meaning "submission", in the sense of submission to God) is universal (membership is open to anyone); like Judaism, it has a strictly unitary conception of God, called "tawhid", or "strict" or "simple" monotheism. Historically, the Abrahamic religions have been considered to be Judaism, Christianity and Islam. Some of this is due to the age and larger size of these three. The other, similar religions were seen as either too new to judge as being truly in the same class, or too small to be of significance
World religions promoting the paradigm's portrayal of different religious traditions as rigid, homogenous categories, the scholar Teemu Taira suggested introducing ethnographic case studies into the class to better explain the realities of people's lives and uses of religious traditions. World religions World religions is a category used in the study of religion to demarcate the five—and in some cases six—largest and most internationally widespread religious movements. Christianity, Islam, Judaism, Hinduism, and Buddhism are always included in the list, being known as the "Big Five". Some scholars also include another religion, such as Sikhism, Zoroastrianism, or the Bahá'í Faith, in the category. The