A concentration of population 'greatly accelerates the attainment of prosperity, and enlarges the fund which may be drawn upon for further emigration'.

The central plateau constitutes only 25 percent of the land area but contains the heaviest concentration of population and the country's largest cities.

The concentration of population must have a name, be locally recognized, and not be part of any other place.

Perhaps the great geographical concentration of population and the corresponding short distances between urban centres was crucial.

With the concentration of population came more interest in education and culture.