in these places the city that plans has become a reality there is no shortage of places where planning is practiced as a vanity for national or municipal leadership where imported ideas of what will lead to a good city are recited by planners from their textbooks or in response to the directives of their political leaders where visions of urban form and urban design are thought to be sufficient to charting the future where implementation is an afterthought and where the objective is the planned city therefore as the united nations embarks on charting the new urban agenda it is important that the discussions recognize the diverse contexts as well as issues and lessons emerging from them