 Who 's Your City ? is divided into four parts with a total of 16 chapters . The first part presents data that suggests the world 's population and economy are becoming increasingly geographically concentrated into few mega @-@ regions , such as <unk> and the San Francisco Bay Area . Thomas Friedman 's Flat World Theory , or his assertion that distance and place is becoming irrelevant , is countered by Florida with maps of population growth , economic activity , innovation ( as demonstrated by patent registration ) , and scientific discovery ( as demonstrated by residence of the most heavily cited scientists ) . Florida 's maps show " spiky " concentrations in these mega @-@ regions , although each region does not necessarily rank high in each category . For example , the <unk> Belt ranks high in innovation but low in scientific discovery , and Indian and Pakistani cities show high population concentrations but low economic activity . Florida explains the existence of these geographical spikes by insisting that talented individuals tend to cluster to one another , creating a ( non @-@ linear ) multiplier effect that attracts additional talented individuals to that geographical area . 
