History 

The Islam appeared in Aràbia from the Christian time in the 7th century with the appearance of the prophet Mahoma. A century after his death, the Islamic State spread from the Atlantic Ocean to  Central Asia. This empire did not stay joined for a long time; the new system of government soon derived in a civil war known by the historians of the Islam as the Fitna, and later affected by a second Fitna. After this, rival dynasties claimed the caliphate, or leadership of the Muslim world and many states and Islamic empires offered only a symbolic obedience to the caliph, incapable of unifying the Islamic world.

Situation
The Islamic geography is usually located in the North of Africa, Middle East, Indonesia (expect India, where it is a great minority, more than 110 millions of Muslims), Central Asia, South of Asia, some of the Pacific isles and the Indian Ocean. The Islam is also spread in other countries, such as Balkans, south and center of Russia, (Chechnya, Dagestan and Tatars tan), Occidental Africa and Europe (Germany, France, United Kingdom, with large numbers of immigrants from Maghreb and Turkey), Caribbean Isles, Trinidad and Tobago, etc.
The Islam has suffered a big expansion due to the petrol-monarchies from the Persian Gulf.

Continent	Observations	Countries
Asia - (from Middle East until Indonesia)	1. Relations between Muslims and Christians are not easy, just where Christians are native and have the same language and culture as Muslims. 2. Christians living in Islamic countries, two reasons: -Faith testimony. -Promoting social works, working in hospitals, schools, etc.	Afghanistan, Bahrain, Brunei, Indonesia, Iran, Kuwait, Malaysia, Oman, Palestine, Syria, Yemen, Arabia Saudi, Bangladesh, Emirates Arabs, Iraq, Jordanian, Libyan, Maldives, Pakistan, Qatar, Turkey.
Central Asia - Old Soviet Republic	Pacific Islam, influenced by the Sufi mysticisms.	Kazajstan , Tajikistan , Uzbekistan , Kirijistan , Turkmenistan.
Africa -	There are different countries where live together Muslims and Christians. The relations vary from one state to another; there are pacific and violent areas. The latest is found in countries where the Islam has been taken as the official religion, and the Sharia as the main justice system.	Algeria, Chad , Eritrea , Libya, Mali , Mauritania, Nigeria , Somalia , Tunes , Burkina Faso , Egypt , Guinea , Malawi , Morocco , Niger , Senegal , Sudan .