New Ideas Must Use Old Buildings

Advanced Cultures Are Usually Sophisticated Enough, Or Have Been Sophisticated Enough At Some Point In Their Pasts, To Realize That Foxes Shouldn't Be Relied On To Guard Henhouses.

Dull, Inert Cities, It Is True, Do Contain The Seeds Of Their Own Destruction And Little Else. But Lively, Diverse, Intense Cities Contain The Seeds Of Their Own Regeneration, With Energy Enough To Carry Over For Problems And Needs Outside Themselves.

Throughout The World Dark Ages Have Scrawled Finis To Successions Of Cultures Receding Far Into The Past.

Beneficent Spirals, Operating By Benign Feedback, Mean That Everything Needful Is Not Required At Once: Each Individual Improvement Is Beneficial For The Whole

Traffic Congestion Is Caused By Vehicles, Not By People In Themselves.