In the period of decolonialism 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.[9] Egyptian president Nasser saw the idea of Muslim unity as a threat to Arab nationalism.[10]