Final answer:
The development of agriculture and the subsequent rise of cities, states, and empires epitomize the Agrarian Age, marking a pivotal shift from nomadic to agricultural societies and giving rise to early civilizations such as Sumer.
Step-by-step explanation:
The rise and fall of cities, states, and empires constitute a significant theme of the agricultural and urban revolution that occurred during the Agrarian Age. This period saw a transformative change from nomadic hunter-gatherer societies to more complex, sedentary civilizations based on agriculture and animal domestication. Early civilizations like Sumer, along with others in Egypt, the Indus Valley, and China represented the rise of human society's ability to create art, politics, and culture in urban settings, reflecting a significant leap in human organizational capability and cultural development.