Sentence:  Planners and urban designers would, then, be able to conceive a clear and strong image of the Earth's future urban patterns, with each city (hopefully) keeping its own visible identity and having its own open lands, water bodies, and recreational areas all around. Such an image, if properly invented, advocated, accepted by political leaders, and loved by the people, cannot but create the magnetism, enthusiasm, and power that will help us implement it in the decades ahead, thus avoiding the <WSD>Ecumenopolitan</WSD> horror of combined complete congestion and sprawl that Doxiadis<!-- i.e., Konstantinos Apostolos Doxiadis, architect and coiner of the terms “ekistics” and “ecumenopolis” --> would have our grandchildren and great-grandchildren inhabit! 
Meaning of the word marked with <WSD> tags:  Of or characteristic of the Ecumenopolis.