Jacobs approached cities as living beings and ecosystems. She suggested that over time, buildings, streets and neighborhoods function as dynamic organisms, changing in response to how people interact with them. She explained how each element of a city – sidewalks, parks, neighborhoods, government, economy – functions together synergistically, in the same manner as the natural ecosystem. This understanding helps us discern how cities work, how they break down, and how they could be better structured. [Project for Public Spaces](https://www.pps.org/reference/jjacobs-2/)