aintained that some knowledge of the theory which underlies an art was
desirable for manual practitioners of the art; but the changes of the
last fifty years in the practice of the arts and trades may be said to
have demonstrated that his views were thoroughly sound. The applications
of science in the arts and trades have been so numerous and productive,
that widespread training in science has become indispensable to any
nation which means to excel in the manufacturing industries, whether of
large scale or small scale. The extraordinary popularity of evening
schools and correspondence schools in the United States rests on the
need which young people employed in the various industries of the
country feel of obtaining more theoretical knowledge about the physical
or chemical processes through which they are earning a livelihood. The
Young Men's Christian Associations in the American cities have become
great centres of evening instruction for just such young persons. The
correspondence schools are teaching hundreds of thousands of young
people at work in machine-shops, mills, mines, and factories, who
believe that they can advance themselves in their several occupations by
supplementing their elementary education with correspondence courses,
taken while they are at work earning a livelihood in industries that
rest ultimately on applications of science.

Spencer's objection to the constant exercise of authority and compulsion
in schools, families, and the State is felt to-day much more widely than
it was in 1858, when he wrote his essay on moral education. His proposal
that children should be allowed to suffer the natural consequences of
their foolish or wrong acts does not seem to the present generation--any
more than it did to him--to be applicable to very young children, who
need protection from the undue severity of many natural penalties; but
the soundness of his general doctrine that it is the true function of
parents and teachers to see that children habitually experience the
normal consequences of their conduct, without putting artificial
consequences in place of them, now commands the assent of most persons
whose minds have been freed from the theological dogmas of original sin
and total depravity. Spencer did not expect the immediate adoption of
this principle; because society as a whole was not yet humane enough. He
admitted that the uncontrollable child of ill-controlled adults might
sometimes have to be scolded