Meet the Author:
Pauline Bullen,  Harare, Zimbabwe

David Maddox

Founder & Editor-in-Chief, The Nature of Cities Principal, Urban Oikos Partners LLC, New York, NY USA David Maddox is committed to the health of the urban ecosystem—urban resilience, the application of ecosystem services for human welfare and livelihoods, and the effective and efficient monitoring and evaluation of these issues. He has worked for The Nature Conservancy, for the Maryland State government, for the City of New York, in non-profits, and as a consultant. As Founder and Editor of TheNatureOfCities.com and Principal of Urban Oikos Partners LLC, his current work is in the development and dissemination of useful knowledge for design and management of social-ecological systems in urban landscapes. He holds a PhD in Ecology and Evolutionary Biology, with a statistics minor, from Cornell University and is a published playwright, musician and composer. He lives in New York City.

Graffiti and street art can be controversial, but can also be a medium for voices of social change, protest, or expressions of community desire. What, how, and where are examples of graffiti as a positive force in communities?

David Maddox, New York City, United States 
Pauline Bullen, Harare, Zimbabwe 
Paul Downtown, Adelaide, Australia 
Emilio Fantin, Milan, Italy 
Ganzeer, Los Angeles, United States 
Germán GĂłmez Eslava, Bogotá, Colombia 
Sidd Joag, New York City, United States 
Patrick Lydon, San Jose, United States / Seoul, South Korea 
Patrice Milillo, Los Angeles, United States 
Laura Shillington, Managua, Nicaragua / Montreal, Canada