its ideology based on the writings of its deceased founder al-Nabhani. Because these principles have been in place since the party's founding, they are therefore considered unlikely to change. The party itself claims its "ideology and its method of work" has been "meticulously thought out and published in many detailed books." Prospective HT members study the "core books" of HT in preparation for being accepted as members. Hizb ut-Tahrir websites, speeches, etc. also detail party positions. Critics have pointed out differences between party texts and public statements and accused HT of varying its "message to suit different audiences", or of attempting to "soften" its public image (by deleting pamphlets from its website and other means), "as a defensive reaction to increased scrutiny," while leaving its original strategy and ideology untouched. HT itself claims there is "a lot of ... propaganda and disinformation" about the party and the caliphate being spread by enemies to "demonise" HT. Draft Constitution The HT Draft Constitution or "proposed constitution," which contains many party positions, has been described by one party leader, Jalaluddin Patel, as "the sum of all the work and research" the party has "done in this field", "based on Ijtihad", interpretations of Islamic texts and traditions, schools of fiqh and individual scholars, (including Shi'a) and consultation with "various Islamic groups around the world". Patel also told Jamestown that if "the future Caliph" is not a member of HT, the party will offer the constitution to him as a "working document" which he can "accept, amend or indeed reject in favor of his own opinion and Ijtihad (interpretation)". Khilafah/Caliphate and Islam Caliphate Hizb ut-Tahrir texts and websites hold that re-establishing the Khilafah state or Caliphate based on sharia law has been decreed by God as the "most important" obligation of Muslims, who will be punished if they neglect it. Without the caliphate and true sharia law, Muslims have been living in a state of jahiliyya (pre-Islamic ignorance). "Not a single country or state" has escaped jahilayya and unbelief, including ones that consider themselves to be Islamic states, such as the Kingdom of Saudi Arabia and the Islamic Republic of Iran. These and all other Muslim-majority states and polities—Kurds, Turks, Iran, Saudi Arabia, etc. – serve as "agents" of a non-Muslim power- usually of the United States- and, their anti-American rhetoric and policies and their fighting amongst each other notwithstanding, they are actually "working harmoniously