onies of America represent his greatest contribution to the world.
To us he is important, for he embodied in one mind the expression of
scientific and political truth, showing that science makes for
democracy and democracy for science. In each case it is the choice of
the liberalized mind.

_The Study of the Biological and Physical Sciences_.--The last century
is marked by scientific development along several {466} rather distinct
lines as follows: the study of the earth, or geology; animal and
vegetable life, or biology; atomic analysis, or chemistry;
biochemistry; physics, especially that part relating to electricity and
radioactivity; and more recently it might be stated that investigations
are carried on in psychology and sociology, while mathematics and
astronomy have made progress.

The main generalized point of research, if it could be so stated, is
the discovery of law and order. This has been demonstrated in the
development of chemistry under the atomic theory; physics in the
molecular theory; the law of electrons in electricity, and the
evolutionary theory in the study of biology. Great advance has been
made in the medical sciences, including the knowledge of the nature and
prevention of disease. Though a great many new discoveries and, out of
new discoveries, new inventions have appeared along specific lines and
various sciences have advanced with accuracy and precision, perhaps the
evolutionary theory has changed the thought of the world more than any
other. It has connected man with the rest of the universe and made him
a definite part of it.

_The Evolutionary Theory_.--The geography of the earth as presented by
Lyell, the theory of population of Malthus, and the _Origin of the
Species_ and the _Descent of Man_ by Darwin changed the preconceived
notions of the creation of man. Slowly and without ostentation science
everywhere had been forcing all nature into unity controlled by
universal laws. Traditional belief was not prepared for the bold
statement of Darwin that man was part of the slow development of animal
life through the ages.

For 2,000 years or more the philosophic world had been wedded to the
idea of a special creation of man entirely independent of the creation
of the rest of the universe. All conceptions of God, man, and his
destiny rested upon the recognition of a separate creation. To deny
this meant a reconstruction of much of the religious philosophy of the
world. Persons {4