Law, agrees with the needs of the time, is easy to use, and is free of disagreement (khilaf). The Supreme Imam then orders the rulers of Muslims to apply it (al-'amal bihi)" Post-Ottoman era After the Abolition of Caliphate in 1924, Pan-Islamism mobilized Muslim masses of both traditionalist and reform movements in Islam, inspired by the ideas of Rashid Rida. The Reformist movements led by Rida, would become more fundamentalist and literalist; emphasizing adherence to the idealised era of the Salaf and attempt to revive lost traditions. Rashid Rida's socio-political views symbolised the convergence of the doctrines of the reformist, Salafist and pan-Islamist movements. During the 1920s, Rida and his Salafi disciples established the Young Men's Muslim Association (YMMA); an influential Islamist youth organisation that spearheaded attacks against liberal trends and Western culture. This provided favourable conditions for the growth of various Islamist revolutionary movements. The evolution of the early Pan-Islamist movement in the post-colonial world was strongly associated with Islamism. Leading Islamists such as Sayyid Qutb, Abul Ala Maududi, and Ayatollah Khomeini all stressed their belief that a return to traditional Sharia law would make Islam united and strong again. Extremism within Islam goes back to the 7th century to the Kharijites. From their essentially political position, they developed extreme doctrines that set them apart from both mainstream Sunni and Shiʿa Muslims. The Kharijites were particularly noted for adopting a radical approach to Takfir, whereby they declared other Muslims to be unbelievers and therefore deemed them worthy of death. In the period of de-colonialism following World War II, Arab nationalism overshadowed Islamism which denounced nationalism as un-Islamic. In the Arab world secular pan-Arab parties – Baath and Nasserist parties – had offshoots in almost every Arab country, and took power in Egypt, Libya, Iraq and Syria. Islamists suffered severe repression; its major thinker Sayyid Qutb, was imprisoned, underwent torture and was later executed. Egyptian president Nasser considered the idea of Muslim unity as a threat to Arab nationalism. In the 1950s, Pakistan's government championed Muslim cooperation like many other Muslim countries however Pakistan’s efforts were complicated with its involvement in Baghdad pact and pro-western foreign diplomacy in light of the Palestine-Israel conflict, however later relations would be much better. Many Muslim countries suspected that Pakistan was aspiring to leadership of the Muslim world to in foreword help western powers in relations with other Muslim states. Six-Day War Following the