activity whose basis is common thought and its ultimate purpose the
common good.

It has been said with truth that it is easier to trace the growth of
science as a joint product of co-operating minds, than to find a growth
of common sentiments among the men and the nations who have created it.
True among individuals, it must be at least as true among groups and
nations. We may work successfully with some one at a problem or learn
from a teacher or a companion when we dislike him personally and do not
seek his society apart from the needs of our common work. It has often
happened, and will happen again in private and public. But though
particular antipathies may increase, the tendency to dislike others is a
diminishing quality among civilized men. In the long run common sense
and necessity will prevail. We are born to live a while before we die;
and we must live on the same planet, sometimes next door to those who
have sworn a never-dying hate.




II

UNITY IN PREHISTORIC TIMES[1]


The new perspective, with all its shift of values, which is forced on us
by the war, touches the past no less than the present and the future.
However objectively we try to present to ourselves the data of history,
we cannot emancipate ourselves from the need to present them from a
point of view which must in the last resort be our own. We may bring