I could go into long philosophical discussions about what diversity actually means. Social? Economic? Geographic? Ethnic? Or why it's actually so important to us (cynically: so we can develop ads that manipulate even more people by tapping into what we understand of their desires and fears). For me, it comes down to this: entry-level advertising jobs need to pay more. Otherwise – and this is speaking for London specifically – you're only going to get home-county-dwelling* candidates from selected social strata. * Home counties: the counties literally surrounding London, and hence make commuting feasible. And, of course, there are those whose parents let them live in their London properties. Full disclosure: my parents supported me both through university and through my career. And I'd be very surprised if Trollkin can get through university on her own terms (and would rather have her rely on us than a sugar parent).