dr. benjamin barb, senior research scholar of the center for philanthropy and civil society at the graduate center of the city university of new york, dr. barber. [applause] >> thank you so much for the boston book festival for inviting me at a chance also interact begin with people who i've come to be really fun of in the world we live in today which is people like mayor wong, mayor rivera and mayor walsh, and also tom menino who i had the pleasure also a beating earlier -- meeting earlier this year. to be with mayor walsh, mayor wong and mayor rivera to talk about cities and mayors is a particular pleasure, and they're glad they're here because for a change i.t. to say something about people who have a chance to either say are you crazy? or, yeah, i think you got that right. but let me just back up for a minute and talk a little bit about the era in which we are living and why for many cities, mayors, city councils and this citizens of cities have become so important. in an air of isil, ebola and terrorism and national gridlock and the congress, not just here but in many places in the world, that our political systems around the world are in