Judaism, Christianity and Islam, the three major monotheistic religions, all originated in what is known today as the Arab World. Monotheism literally means "the belief in only one God". The central values of family, charity, and respect for others are shared by these three religions.Judaism, Christianity and Islam, the three major monotheistic religions, all originated in what is known today as the Arab World. Monotheism literally means "the belief in only one God". The central values of family, charity, and respect for others are shared by these three religions.