Ahmadiyya (Arabic: أحمدية; Urdu: احمدِیہ) is an Islamic reformist movement founded in British India near the end of the 19th century, originating with the life and teachings of Mirza Ghulam Ahmad (1835–1908), who claimed to have fulfilled the prophecies of the world's reformer during the end times, who was to herald the Eschaton as predicted in the traditions of various world religions and bring about the final triumph of Islam as per Islamic prophecy. He claimed that he was the Mujaddid (divine reformer) of the 14th Islamic century, the promised Messiah and Mahdi awaited by Muslims. The adherents of the Ahmadiyya movement are referred to as Ahmadis or Ahmadi Muslims.
Ahmadi thought emphasizes the belief that Islam is the final dispensation for humanity as revealed to Muhammad and the necessity of restoring to it its true essence and pristine form, which had been lost through the centuries. Thus, Ahmadis view themselves as leading the revival and peaceful propagation of Islam. The Ahmadis were among the earliest Muslim communities to arrive in Britain and other Western countries.
Ahmadiyya adherents believe that God sent Ahmad, like Jesus, to end religious wars, condemn bloodshed and reinstitute morality, justice and peace. They believe that he divested Islam of fanatical beliefs and practices by championing what is in their view, Islam’s true and essential teachings as practised by the Prophet Muhammad.
Mirza Ghulam Ahmad founded the movement on 23 March 1889 and termed it the Ahmadiyya Muslim Jama'at (community), envisioning it to be a revitalisation of Islam. Ahmadis consider themselves Muslims and claim to practice Islam in its pristine form; however, some Ahmadiyya-specific beliefs have been thought of as opposed to contemporary mainstream Islamic thought since the movement's birth. Many mainstream Muslims do not consider Ahmadis to be Muslims, citing in particular the Ahmadiyya viewpoint on the death and return of Jesus (see Jesus in Islam), the Ahmadiyya concept of Jihad in a peaceful format and the community's view of the finality of prophethood with particular reference to the interpretation of Quran 33:40. In several Islamic countries today Ahmadis have been marginalised by the majority religious community; severe persecution and often systematic oppression have led many Ahmadis to emigrate and settle elsewhere.