236 
POLITICAL ECONOMY 
its potential supplies. Action of the latter 
kind must obviously aim at raising the vertical 
mobility of the population, as it may be put 
technically—at rendering it increasingly 
possible for talents to discover themselves 
and discover in addition suitable outlets. 
As things are the national product would 
rise if the relative number of those who 
function as organisers and sub-organisers 
increased ; and their relative numbers would 
tend to increase were they picked from a 
wider field, so that the supply price for any 
given number of them would be reduced. 
Moreover, when organisers are picked from 
a wide field, the level of capacity among them 
may be expected to be higher than when they 
are picked from a narrow field. And, in 
addition, when forcible and continual com 
petitive pressure is brought to bear upon the 
organising ranks from below, by new men 
who are attempting to force their way into 
the ranks of leadership, those who are already 
established are compelled to be zealous and 
alert. Of the enlarged product brought 
about by the vertical mobility of labour, a 
substantial portion must almost certainly be 
reaped by labour, because the marginal utility 
of labour tends to rise as the amount and 
efficiency of the attention devoted to its