Monotheism is perhaps the most important tenet of Islam and is, arguably, the fundamental concept of the religion. In Arabic, monotheism is also known as tawheed, and refers to the uniqueness and supremacy of God, or Allah. In Islam, Allah is the singular master and creator of the universe. Tawheed means specifically that there is no other being or deity worthy of worship except Allah. According to the Qur'an, Allah is a universal God, meaning that different local or tribal gods simply don't exist.