SUPPLY AND DEMAND 
91 
of improving his position, the ambitious 
operative is not likely to work with much 
enthusiasm. 
When all this has been said, however, 
every aspect of the problem of the efficiency of 
labour has not been presented. A community 
is only rendered most efficient, in the broadest 
sense of the term, when the most valuable 
productive potentiality of each person has 
been rendered actual. To bring out the 
highest powers of the individual and place 
him at work suited to his capacity implies an 
educational system which is successful both 
in disclosing and training ability and a social 
system wherein an individual, whatever the 
grade of his birth, finds no difficulty in making 
his way into the economic ranks for func 
tioning in which he is well endowed naturally 
and properly prepared. Given these conditions 
and a sufficiency of initiative and perseverance 
in the individual, the vertical mobility of 
labour (by which is meant the recruiting of one 
economic class from another) is said to be 
high. 
The end of production, we must bear in 
mind, is not to secure the greatest volume of 
goods, but, other things being equal, the 
greatest volume when they consist in the 
articles and services most in demand. Exactly