Citi moves $2 quadrillion a year for 6,000 multinationals. No wonder its CEO has a provocative global perspective. ›› ‘Having a human bank is very important.’ A C O N V E R S AT I O N W I T H C I T I C E O J A N E F R A S E R P H O T O G R A P H C E L E S T E S L O M A N / T R U N K A R C H I V E 62 M C K I N S EY Q UA RT E R LY