Although orthodox planning theory had blamed high density for crime, filth, and a host of other problems, Jacobs disproved these assumptions and demonstrated how a high concentration of people is vital for city life, economic growth, and prosperity. While acknowledging that density alone does not produce healthy communities, she illustrated through concrete examples how higher densities yield a critical mass of people that is capable of supporting more vibrant communities. In exposing the difference between high density and overcrowding, Jacobs dispelled many myths about high concentrations of people. [Project for Public Spaces](https://www.pps.org/reference/jjacobs-2/)