Upper and Lower Egypt in the context of "Menes"

Ancient Egypt was a cradle of civilization concentrated along the lower reaches of the Nile River in Northeast Africa. It emerged from prehistoric Egypt around 3150 BC (according to conventional Egyptian chronology), when Upper and Lower Egypt were amalgamated by Menes, who is believed by the majority of Egyptologists to have been the same person as Narmer. The history of ancient Egypt unfolded as a series of stable kingdoms interspersed by the "Intermediate Periods" of relative instability. These stable kingdoms existed in one of three periods: the Old Kingdom of the Early Bronze Age; the Middle Kingdom of the Middle Bronze Age; or the New Kingdom of the Late Bronze Age.

The pinnacle of ancient Egyptian power was achieved during the New Kingdom, which extended its rule to much of Nubia and a considerable portion of the Levant. After this period, Egypt entered an era of slow decline. Over the course of its history, it was invaded or conquered by a number of foreign civilizations, including the Hyksos, the Kushites, the Assyrians, the Persians, and the Greeks and then the Romans. The end of ancient Egypt is variously defined as occurring with the end of the Late Period during the Wars of Alexander the Great in 332 BC or with the end of the Greek-ruled Ptolemaic Kingdom during the Roman conquest of Egypt in 30 BC. In AD 642, the Arab conquest of Egypt brought an end to the region's millennium-long Greco-Roman period.

A centralized government (also united government) is one in which both executive and legislative power is concentrated centrally at the higher level as opposed to it being more distributed at various lower level governments. In a national context, centralization occurs in the transfer of power to a typically unitary sovereign nation state. Executive and/or legislative power is then minimally delegated to unit subdivisions (state, county, municipal and other local authorities). Menes, an ancient Egyptian pharaoh of the early dynastic period, is credited by classical tradition with having united Upper and Lower Egypt, and as the founder of the first dynasty (Dynasty I), became the first ruler to institute a centralized government.

All constituted governments are, to some degree, necessarily centralized, in the sense that even a federation exerts an authority or prerogative beyond that of its constituent parts. To the extent that a base unit of society – usually conceived as an individual citizen – vests authority in a larger unit, such as the state or the local community, authority is centralized. The extent to which this ought to occur, and the ways in which centralized government evolves, forms part of social contract theory.

Ancient Egypt spans the period of Egyptian history from the early prehistoric settlements of the northern Nile valley to the Roman conquest of Egypt in 30 BC. The pharaonic period, the period in which Egypt was ruled by a pharaoh, is dated from the 32nd century BC, when Upper and Lower Egypt were unified, until the country fell under Macedonian rule in 332 BC.

The Early Dynastic Period, also known as Archaic Period or the Thinite Period (from Thinis, the hometown of its rulers), is the era of ancient Egypt that immediately follows the unification of Upper and Lower Egypt in c. 3150 BC. It is generally taken to include the First Dynasty and the Second Dynasty, lasting from the end of the archaeological culture of Naqada III until c. 2686 BC, or the beginning of the Old Kingdom. With the First Dynasty, the Egyptian capital moved from Thinis to Memphis, with the unified land being ruled by an Egyptian god-king. In the south, Abydos remained the major centre of ancient Egyptian religion; the hallmarks of ancient Egyptian civilization, such as Egyptian art, Egyptian architecture, and many aspects of Egyptian religion, took shape during the Early Dynastic Period.

Before the unification of Egypt, the land was settled with autonomous villages. With the early dynasties, and for much of Egypt's history thereafter, the country came to be known as "The Two Lands" (referencing Upper and Lower Egypt). The pharaohs established a national administration and appointed royal governors, and buildings of the central government were typically open-air temples constructed of wood or sandstone. The earliest Egyptian hieroglyphs appear just before this period, though little is known of the spoken language that they represent.

The First Dynasty of ancient Egypt (Dynasty I) covers the first series of Egyptian kings to rule over a unified Egypt. It immediately follows the unification of Upper and Lower Egypt, by Menes, or Narmer, and marks the beginning of the Early Dynastic Period, when power was centered at Thinis.

The date of this period is subject to scholarly debate about the Egyptian chronology. It falls within the early Bronze Age and is variously estimated to have begun anywhere between the 34th and the 30th centuries BC. In a 2013 study based on radiocarbon dates, the accession of Hor-Aha, the second king of the First Dynasty, was placed between 3111 and 3045 BC with 68% confidence, and between 3218 and 3035 with 95% confidence. The same study placed the accession of Den, the sixth king of the dynasty, between 2928 and 2911 BC with 68% confidence, although a 2023 radiocarbon analysis placed Den's accession potentially earlier, between 3011 and 2921, within a broader window of 3104 to 2913.