Although it has an overwhelming Muslim majority, the country is not an Islamic state. Article 29 of Indonesia's Constitution however affirms that “the state is based on the belief in the one supreme God.” Over the past 50 years, many Islamic groups have opposed this secular and pluralist direction, and sporadically have sought to establish an Islamic state. However, the country's mainstream Muslim community, including influential social organisations such as Muhammadiyah and NU, reject the idea. Proponents of an Islamic state argued unsuccessfully in 1945 and throughout the parliamentary democracy period of the 1950s for the inclusion of language (the "Jakarta Charter") in the Constitution's preamble making it obligatory for Muslims to follow shari'a.