These impulses underlie the formal vocabulary of architecture and urbanism. Waterhouse follows them through the theories, ideologies, and styles that seem to govern city buildings; he finds their presence in the creation of territorial divisions, and also wherever the cityscape has been shaped by a poetic imagination. Tracing his narrative of urban boundaries from antiquity to the birth of modernism, Waterhouse discovers some stubborn legacies that bind contemporary urban design to the past. Part One explores the boundary dialectic in our regard for deities, for nature, and for one another, and then as a powerful influence on architectural invention and our ways of life. Part Two traces these themes through city building history, to show how architecture and human relatedness are subordinated by boundary formation in the cycles of urbanization.