National Affairs: Challenge

We . . . believe in a civilization of construction and not of destruction. . . . Can we continue our peaceful construction if all the other continents embrace by preference or by compulsion a wholly different principle of life?

That question President Roosevelt last week asked of 2,500 delegates to the eighth American Scientific Congress, meeting in Washington's big Constitution Hall; and his words, sent out on a worldwide broadcast, collided with reports of destruction as Germany's armies swept into the Low Countries.

He asked his question in a week in which World War II became concrete and real for U. S....

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