MAN'S ADVANCE IN KNOWLEDGE

Meanwhile, in the calm, enduring realm of scientific knowledge, there
was progress, as there is always progress.

No matter what man's cruelty to his fellows, he has still his
curiosity. Hence he continues forever gathering more and more facts
explaining his environment. He continues also molding that environment
to his desires. Imagination makes him a magician.

Most surprising of his recent steps in this exploration of his
surroundings was the attainment of the South Pole in 1911.[1] This came
so swiftly upon the conquest of the North Pole, that it caught the
world unprepared; it was an unexpected triumph. Yet it marks the
closing of an era. Earth's surface has no more secrets concealed from
man. For half a century past, the only remaining spaces of complete
mystery, of utter blankness on our maps, were the two Poles. And now
both have been attained. The gaze of man's insatiable wonderment must
hereafter be turned upon the distant stars.

[Footnote 1: See _Discovery of the South Pole_, page 218.]

But man does not merely explore his environment; he alters it. Most
widespread and important of our recent remodelings of our surroundings
has been the universal adoption of the automobile. This machine has so
increased in popularity and in practical utility that we may well call
ours the "Automobile Age." The change is not merely that one form of
vehicle is superseding another on our roads and in our streets. We face
an impressive theme for meditation in the fact that up to the present
generation man was still, as regarded his individual personal transit,