James Van Allen has died. Here is a provocative excerpt from one of his most recent writings on space policy:

In a dispassionate comparison of the relative values of human and robotic spaceflight, the only surviving motivation for continuing human spaceflight is the ideology of adventure. But only a tiny number of Earth’s six billion inhabitants are direct participants. For the rest of us, the adventure is vicarious and akin to that of watching a science fiction movie. At the end of the day, I ask myself whether the huge national commitment of technical talent to human spaceflight and the ever-present potential for the loss of precious human life are really justifiable.

In his book Race to the Stratosphere: Manned Scientific Ballooning in America (Springer-Verlag, New York, 1989), David H. De Vorkin describes the glowing expectations for high-altitude piloted balloon flights in the 1930s. But it soon became clear that such endeavors had little scientific merit. At the present time, unmanned high-altitude balloons continue to provide valuable service to science. But piloted ballooning has survived only as an adventurous sport. There is a striking resemblance here to the history of human spaceflight.

Have we now reached the point where human spaceflight is also obsolete? I submit this question for thoughtful consideration. Let us not obfuscate the issue with false analogies to Christopher Columbus, Ferdinand Magellan, and Lewis and Clark, or with visions of establishing a pleasant tourist resort on the planet Mars.