According to the historian Professor Mubarak Ali, textbook reform in Pakistan began with the introduction of Pakistan Studies and Islamic studies by Zulfiqar Ali Bhutto in 1971 into the national curriculum as compulsory subject. Former military dictator Gen Zia-ul-Haq under a general drive towards Islamization, started the process of historical revisionism in earnest and exploited this initiative. 'The Pakistani establishment taught their children right from the beginning that this state was built on the basis of religion – that's why they don't have tolerance for other religions and want to wipe-out all of them.'