Malaysia has its origins in the Malay Kingdoms present in the area which, from the 18th century, became subject to the British Empire. The first British territories were known as the Straits Settlements, whose establishment was followed by the Malay kingdoms becoming British protectorates. The territories on Peninsular Malaysia were first unified as the Malayan Union in 1946. Malaya was restructured as the Federation of Malaya in 1948, and achieved independence on 31 August 1957. Malaya united with North Borneo, Sarawak, and Singapore on 16 September 1963, with si being added to give the new country the name Malaysia. Less than two years later in 1965, Singapore was expelled from the federation.
The country is multi-ethnic and multi-cultural, which plays a large role in politics. The constitution declares Islam the state religion while protecting freedom of religion. The government system is closely modelled on the Westminster parliamentary system and the legal system is based on English Common Law. The head of state is the King, known as the Yang di-Pertuan Agong. He is an elected monarch chosen from the hereditary rulers of the nine Malay states every five years. The head of government is the Prime Minister.
The Malaysian constitution guarantees freedom of religion while making Islam the state religion. According to the Population and Housing Census 2010 figures, ethnicity and religious beliefs correlate highly. Approximately 61.3% of the population practice Islam, 19.8% practice Buddhism, 9.2% Christianity, 6.3% Hinduism and 1.3% practice Confucianism, Taoism and other traditional Chinese religions. 0.7% declared no religion and the remaining 1.4% practised other religions or did not provide any information. Sunnis form the majority with non-denominational Muslims being the second largest group of Muslims at 18%.
All ethnic Malays are considered Muslim by law of the Constitution. Statistics from the 2010 Census indicate that 83.6% of the Chinese population identify as Buddhist, with significant numbers of adherents following Taoism (3.4%) and Christianity (11.1%), along with small Hui-Muslim populations in areas like Penang. The majority of the Indian population follow Hinduism (86.2%), with a significant minority identifying as Christians (6.0%) or Muslims (4.1%). Christianity is the predominant religion of the non-Malay bumiputera community (46.5%) with an additional 40.4% identifying as Muslims.
Muslims are obliged to follow the decisions of Syariah courts in matters concerning their religion. The Islamic judges are expected to follow the Shafi`i legal school of Islam, which is the main madh'hab of Malaysia. The jurisdiction of Shariah courts is limited to Muslims in matters such as marriage, inheritance, divorce, apostasy, religious conversion, and custody among others. No other criminal or civil offences are under the jurisdiction of the Shariah courts, which have a similar hierarchy to the Civil Courts. Despite being the supreme courts of the land, the Civil Courts do not hear matters related to Islamic practices.
The word Melayu is thought to derive from the Tamil words Malai and ur meaning "mountain" and "city, land", respectively.