Sikhism (; , ), or Sikhi (from Sikh, meaning a disciple, or a learner), one of the youngest amongst the major world religions, is a monotheistic religion that originated in the Punjab region of South Asia (subcontinental India) during the 15th century. The fundamental beliefs of Sikhism, articulated in the sacred scripture Guru Granth Sahib, include faith and meditation on the name of the one creator, unity and equality of all humankind, engaging in selfless service, striving for social justice for the benefit and prosperity of all, and honest conduct and livelihood while living a householder's life. With over 25 million adherents worldwide, Sikhism is the fifth-largest religion in the world.