First Islamic state in the context of "Rashidun"

The early Muslim conquests or early Islamic conquests (Arabic: الْفُتُوحَاتُ الإسْلَامِيَّة, romanized: al-Futūḥāt al-ʾIslāmiyya), also known as the Arab conquests, were a series of wars initiated in the 7th century by Muhammad, the prophet of Islam. He established the first Islamic state in Medina, Arabia that expanded rapidly under the Rashidun Caliphate and the Umayyad Caliphate, culminating in Muslim rule being established in Asia, Northern Africa, and Southern Europe over the following century. According to historian James Buchan: "In speed and extent, the first Arab conquests were matched only by those of Alexander the Great, and they were more lasting." At their height, the territory that was conquered by the Arab Muslims stretched from Iberia (at the Pyrenees) in the west to India (at Sind) in the east; Muslim control spanned Sicily, most of the Middle East and North Africa, and the Caucasus and Central Asia.

Among other drastic changes, the early Muslim conquests brought about the collapse of the Sasanian Empire and great territorial losses for the Byzantine Empire. Explanations for the Muslim victories have been difficult to discover, primarily because only fragmentary sources have survived from the period. American scholar Fred McGraw Donner suggests that Muhammad's establishment of an Islamic state in Arabia coupled with ideological (i.e., religious) coherence and mobilization constituted the main factor that propelled the early Muslim armies to successfully establish, in the timespan of roughly a century, one of the largest empires in history. Estimates of the total area of the combined territory held by the early Muslim polities at the conquests' peak have been as high as 13,000,000 square kilometres (5,000,000 sq mi). Most historians also agree that, as another primary factor determining the early Muslim conquests' success, the Sasanians and the Byzantines were militarily and economically exhausted from decades of warfare against each other.

The era of pre-Islamic Arabia encompasses human history in all parts of the Arabian Peninsula before the rise of Islam. During the prehistoric period, humans first migrate and settle into the peninsula. In the early first millennium BC, writing and recorded history are introduced into the Peninsula, along with the rise of the first kingdoms in the south. In the early seventh century, the pre-Islamic period quickly comes to a close, from the beginning of Muhammad's preachings of Islam, to his establishment of the first Islamic state in 622 in Medina, and the subsequent conquest and political unification of the peninsula shortly after Muhammad's death, in the 630s. Some strands of Islamic tradition interpret the pre-Islamic period as a barbaric, morally un-enlightened period known as the "Jahiliyyah" (Arabic: جَاهِلِيَّة), but historians have not adopted this convention.

Pre-Islamic Arabia's demographics included both nomadic and settled populations, the latter of which eventually developed into distinctive civilizations. Eastern Arabia was home to the region's earliest civilizations, such as Dilmun, which is attested as a prominent trade partner of Mesopotamia during the Bronze Age; and its later pre-Islamic history is marked by the reign of consecutive Iranian empires, including those of the Parthians and the Sasanians. From the early 1st millennium BCE onward, South Arabia became home to a number of kingdoms, such as Sheba and Ma'in; while part of North Arabia became home to the Nabataean Kingdom, which was conquered and annexed by the Roman Empire in 106, thereafter being known as Arabia Petraea and initiating the centuries-long Roman period in Arabia.

An Islamic state has a form of government based on sharia. As a term, it has been used to describe various historical polities and theories of governance in the Islamic world. As a translation of the Arabic term dawlah islāmiyyah (Arabic: دولة إسلامية) it refers to a modern notion associated with political Islam (Islamism). Notable historical examples include the first Islamic state in Medina, established by the prophet Muhammad, and the Arab caliphates which continued under his successors, such as the Rashidun and Umayyads.

The concept of the modern Islamic state has been articulated and promoted by ideologues such as Rashid Rida, Mullah Omar, Abul A'la Maududi, Ruhollah Khomeini, Israr Ahmed, Sayyid Qutb and Hassan al-Banna. Implementation of Islamic law plays an important role in modern theories of the Islamic state, as it did in classical Islamic political theories. However, most of the modern theories also make use of notions that did not exist before the modern era.