The history of Sudan extends from antiquity, and is intertwined with the history of Egypt, with which it was united politically over several periods. It is marked by influences (military and cultural) on Sudan from neighboring areas (e.g. Egypt, Arabian Peninsula) and world powers (e.g. United Kingdom, United States). As the largest country in Africa before the secession of South Sudan, it has also seen internal conflict, notably between north and south.

By the eighth millennium BC, people of a Neolithic culture had settled into a sedentary way of life there in fortified mud-brick villages, where they supplemented hunting and fishing on the Nile with grain gathering and cattle herding. During the fifth millennium BC migrations from the drying Sahara brought neolithic people into the Nile Valley along with agriculture, The population that resulted from this cultural and genetic mixing developed social hierarchy over the next centuries become the Kingdom of Kush (with the capital at Kerma) at 1700 BC Anthropological and archaeological research indicate that during the predynastic period Nubia and Nagadan Upper Egypt were ethnically, and culturally nearly identical, and thus, simultaneously evolved systems of pharaonic kingship by 3300 BC.

Sudan (ⁱ/suːˈdæn/ or /suːˈdɑːn/;Arabic: السودان‎, as-Sūdān), officially the Republic of the Sudan (Arabic: جمهورية السودان‎, Jumhūrīyat as-Sūdān), sometimes called North Sudan, is an Arab state in North Africa (sometimes also considered to be part of the Middle East). It is bordered by Egypt to the north, the Red Sea to the northeast, Eritrea and Ethiopia to the east, South Sudan to the south, the Central African Republic to the southwest, Chad to the west, and Libya to the northwest. The population of Sudan is a combination of indigenous inhabitants of Nile Valley, and descendants of migrants from the Arabian Peninsula. Due to the process of Arabisation common throughout the rest of the Arab World, today Arab culture predominates in Sudan. The majority of the population of Sudan adheres to Islam. The Nile divides the country between east and west sides.

The people of Sudan have a long history extending from antiquity which is intertwined with the history of Egypt. Sudan suffered seventeen years of civil war during the First Sudanese Civil War (1955–1972) followed by ethnic, religious and economic conflicts between the Muslim Arab northern Sudanese and the mostly animist and Christian Nilotes of Southern Sudan. This led to the Second Sudanese Civil War in 1983. Because of continuing political and military struggles, Sudan was seized in a bloodless coup d'état by colonel Omar al-Bashir in 1989, who thereafter proclaimed himself President of Sudan. The civil war ended with the signing of a Comprehensive Peace Agreement which granted autonomy to what was then the southern region of the country. Following a referendum held in January 2011, South Sudan seceded on 9 July 2011 with the consent of Sudan's President al-Bashir.

John Garang de Mabior (June 23, 1945 – July 30, 2005) was a Sudanese politician and leader. From 1983 to 2005, he led the Sudan People's Liberation Army during the Second Sudanese Civil War, and following a peace agreement he briefly served as First Vice President of Sudan from January 2005 until he died in a July 2005 helicopter crash.

A member of the Dinka ethnic group, Garang was born into a poor family in Buk village in the upper Nile region of Sudan. An orphan by the age of ten, he had his fees for school paid by a relative, going to schools in Wau and then Rumbek. In 1962 he joined the first Sudanese civil war, but because he was so young, the leaders encouraged him and others his age to seek an education. Because of the ongoing fighting, Garang was forced to attend his secondary education in Tanzania. After winning a scholarship, he went on to earn a B.A.^{[clarification needed]} in economics in 1969 from Grinnell College in Iowa, USA. He was known there for his bookishness. He was offered another scholarship to pursue graduate studies at the University of California, Berkeley, but chose to return to Tanzania and study East African agricultural economics as a Thomas J. Watson Fellow at the University of Dar es Salaam (UDSM). At UDSM, he was a member of the University Students' African Revolutionary Front. However, Garang soon decided to return to Sudan and join the rebels.^{[citation needed]} There is much erroneous reporting that Garang met and befriended Yoweri Museveni, future president of Uganda, at this time; while both Garang and Museveni were students at UDSM in the 1960s, they did not attend at the same time.

The Lost Boys of Sudan is the name given to the groups of over 20,000 boys of the Nuer and Dinka ethnic groups who were displaced and/or orphaned during the Second Sudanese Civil War (1983–2005); about 2.5 million were killed and millions were displaced. The name "Lost Boys of Sudan" was colloquially used by aid workers in the refugee camps where the boys resided in Africa.

Most of the boys were orphans separated from their families when government troops and government-sponsored militias systematically attacked villages in southern Sudan, killing many of the inhabitants. Many avoided capture or death because they were away from their villages tending cattle at the cattle camps (grazing land located near bodies of water where cattle were taken and tended largely by the village children during the dry season) and were able to flee and hide in the dense African bush. Presumably orphaned, they traveled by foot for years in search of safe refuge, on a journey that carried them over a thousand miles across three countries to refugee camps where they resided in Ethiopia and Kenya and in various villages where they sought refuge in South Sudan. Over half died along their epic journey, due to starvation, dehydration, sickness and disease and attack by wild animals and enemy soldiers. Experts say they are the most badly war-traumatized children ever examined. The Foundation For The Lost Boys pay for them to go to school in the states.