Sex differences in religion can be classified as either "internal" or "external". Internal religious issues are studied from the perspective of a given religion, and might include religious beliefs and practices about the roles and rights of men and women in government, education and worship; beliefs about the sex or gender of deities and religious figures; and beliefs about the origin and meaning of human gender. External religious issues can be broadly defined as an examination of a given religion from an outsider's perspective, including possible clashes between religious leaders and laity; and the influence of, and differences between, religious perspectives on social issues. Gender of deities The earliest documented religions, and some contemporary animist religions, involve the deification of characteristics of the natural world. These spirits are typically, but not always, gendered. It has been proposed, since the 19th century, that polytheism arose out of animism, as religious epic provided personalities to autochthonous animist spirits in various parts of the world, notably in the development of ancient near eastern and Indo-European literature. Polytheistic gods are also typically gendered. The earliest evidence of monotheism is the worship of the goddess Eurynome, Aten in Egypt, the teaching of Moses in the Torah and Zoroastrianism in Persia. Aten, Yahweh and Ahura Mazda are all masculine deities, embodied only in metaphor, so masculine rather than reproductively male. Hinduism Kali, the Hindu goddess of both the life cycle and destructive war, breaks the gender role of women representing love, sex, fertility, and beauty. This Hindu deity reflects the modern view of feminism through their depiction of female strength. Christianity In Christianity, one entity of the Trinity, the Son, is believed to have become incarnate as a human male. Christians have traditionally believed that God the Father has masculine gender rather than male sex because the Father has never been incarnated. By contrast, there is less historical consensus on the gender of the Holy Spirit. Islam In Islam, God is not gendered literally or metaphorically. God is referred to with the masculine pronoun in Arabic [Huwa or 'He'], as there is no neuter in the Arabic language. Ascribing natural gender to God is considered heretical because God is described as incomparable to creation. The Quran says: There is nothing like Him, and He ˹alone˺ is the All-Hearing, All-Seeing. In contrast to Christian theology, Jesus is viewed as a prophet rather than a human male incarnation