What has been learned in physics stays learned. People talk about scientific revolutions. The social and political connotations of revolution evoke a picture of a body of doctrine being rejected, to be replaced by another equally vulnerable to refutation. It is not like that at all. The history of physics has seen profound changes indeed in the way that physicists have thought about fundamental questions. But each change was a widening of vision, an accession of insight and understanding. The introduction, one might say the recognition, by man (led by Einstein) of relativity in the first decade of this century and the formulation of quantum mechanics in the third decade are such landmarks. The only intellectual casualty attending the discovery of quantum mechanics was the unmourned demise of the patchwork quantum theory with which certain experimental facts had been stubbornly refusing to agree. As a scientist, or as any thinking person with curiosity about the basic workings of nature, the reaction to quantum mechanics would have to be: “Ah! So that’s the way it really is!” There is no good analogy to the advent of quantum mechanics, but if a political-social analogy is to be made, it is not a revolution but the discovery of the New World.

[The National Academy of Sciences] would be unable to give a unanimous decision if asked whether the sun would rise tomorrow.

A few months after a devastating defeat at Fredericksburg,… President Abraham Lincoln signed into law an act creating the National Academy of Sciences—in the midst of civil war. Lincoln refused to accept that our nation’s sole purpose was mere survival. He created this academy, founded the land grant colleges, and began the work of the transcontinental railroad, believing that we must add—and I quote—“the fuel of interest to the fire of genius in the discovery … of new and useful things.”