Ancient Egypt's history was thousands of years long and involved three major kingdoms with intermediate periods of disorganization in the intervening years. The Old Kingdom ruled Egypt from 2686 to 2181 BCE. During this time, powerful pharaohs completed great pyramids. The kingdom collapsed into chaos and was followed by the First Intermediate Period. In 2055 BCE, the Middle Kingdom arose. It collapsed in 1786 BCE, the beginning of the Second Intermediate Period. The New Kingdom, which included King Tutankhamun's short rule, ran from 1567 to 1085 BCE. Egypt never returned to its former glory, and Alexander the Great of Macedonia conquered it in 332 BCE.Which organizational structure does this text primarily use?