Starting from the late 19th century and emergence of sweeping reform currents of "Salafiyya" across the world, the Salafis of Najd too would undergo a resurgence. After the establishment of The Third Saudi State and Unification of Saudi Arabia, a "Salafiyya" Global movement would crystallise with the backing of a state. Ibn Saud's reforms would get criticism from zealots amongst the Wahhabi clerics reminiscent of the 19th-century harshness. However, other ulema would allow them, eventually paving way for gradual reforms in KSA. Thus new education policy would be approved that would teach foreign languages, sciences, geography, etc. Over the objections of "Ikhwan", the Wahhabi "ulema" would permit the introduction of telegraph and other wireless communication systems. Soon after, oil industries would be developed with the discovery of petroleum. Influential clerics such as Mufti Muhammad ibn Ibrahim Aal ash-Shaykh would endorse female education.