The migration movement towards the cities, which started from the Neolithic Revolution and transformed into a new form with the Industrial Revolution, causes a serious population and urbanization pressure on the cities. Especially in the last decade just before the millennium, a number of models and approaches have been put forth in order to minimize the urban problems caused by people and natural phenomena and the negative effects of these problems on the societies, environment and economy. Even though these approaches are diametrically opposite in some ways, some suggest vertical architecture and some horizontal architecture, all of them aim to serve economic, ecological, political and/or social sustainability. This study focuses on some concepts and models that came to the fore after the millennium in order to solve the problems encountered in urban areas. As a result, it has been clearly understood that the solution initiatives that emerged as a result of rapid technological development and globalization in the post-millennial period, were not only Western-centered as in the post-Industrial Revolution period. In this new period, it has been observed that solution initiatives in different parts of the world can also affect the global agenda on a large scale and find supporters. In this study, urban concepts, which are developed with the effect of recent transformations were identified and explained, possible interpretations of the concepts were analyzed, and the contents of the concepts about future urban problems were tried to be defined