Muslim world are: Saudi Arabia, Pakistan, Afghanistan, Iran, Mauritania, and Yemen. Other states where Islam is the politically defined state religion are: Egypt, Jordan, Iraq, Kuwait, Algeria, Malaysia, Maldives, Morocco, Libya, Tunisia, United Arab Emirates, Somalia and Brunei. Other Muslim-majority countries include: Niger, Indonesia, Sudan, Bosnia and Herzegovina, Sierra Leone, Djibouti, Albania, Azerbaijan, Bangladesh, Burkina Faso, Chad, The Gambia, Guinea, Kazakhstan, Kosovo, Kyrgyzstan, Mali, Northern Cyprus, Nigeria, Senegal, Syria, Lebanon, Tajikistan, Turkmenistan, Turkey and Uzbekistan. More than 24.1% of the world's population is Muslim. Current estimates conclude that the number of Muslims in the world is around 1.8 billion. Muslims are the
Muslim world boundaries of the Muslim world. The Open Doors USA organization, in its 2012 survey of countries around the world that persecute Christians, listed 37 members of the Muslim world amongst the top 50 countries where Christians face the most severe persecution. 9 of the top 10 countries are Islamic-majority states. As the Muslim world came into contact with secular ideals, societies responded in different ways. Some Muslim-majority countries are secular. Azerbaijan became the first secular republic in the Muslim world, between 1918 and 1920, before it was incorporated into the Soviet Union. Turkey has been governed as a secular state