and centralized government. The deserts to the east and west had valuable stones and minerals and helped protect Egypt from much external attack or infiltration. Continuity was very strong. Egypt's religion, its concepts of social order, and its system of strong monarchical government remained fundamentally the same for over 3,000 years. Environmental stability helped, as did ethnic and linguistic continuity; unlike other areas of the Near East, Egypt did not periodically have to absorb large new populations with languages and ideas different from those already established. Equally important did all Egyptians share a powerful and tenacious worldview--an orderly cosmos, enfolding gods, humans, and nature, had been created in complete and perfect form at the beginning of time; its perfection held off the destructive, chaotic forces that surrounded it. Adherence to traditional forms of belief, politics, and culture was believed necessary to maintain perfection and prevent the collapse of the universe. Egyptian art and religious architecture (temples and tombs) closely followed established conventions of style and content because their role was to depict this ideal order--and thus be one of several means ritually integrating Egypt with the cosmos. Change and innovation nevertheless occurred, sometimes violently. Egypt's periodic interludes of disunity were politically disorderly and economically painful in part because inherent problems and contradictions (for example, obvious weakness in "perfect" institutions such as kingship) came to the surface and demanded solutions. Less obviously, change also took place in more stable periods. Bureaucracies were periodically reformed or restructured in the interests of both royal power and fairer government. Religious concepts became increasingly rich and complex. Styles in art and architecture changed subtly to meet new needs and tastes, but all successful innovation required adherence ...
