Huong Lan Vu in his article states that "No country has achieved high income status without first urbanising" This is quite possibly true but is it a necessary condition of achiving high income status? A prerequisite of urbanization is agrarian reform allowing one farmer to produce more food than that required to support him or herself and his/her family. Having first achieved security of food production the next step would be the cost effective production of other goods requiring a concentrated labour force. But how big does that concentrated labour force need to be; 10,000; 100,000; 1,000,000; but surely not 10,000,000. The more populous the city the greater the problems for urban planners. Yet short of draconian measures in restricting peoples freedom of movement how do you limit the size to which cities may grow and what is that ideal size.