The brilliant 2014 science fiction novel “The Three-Body Problem,” by the Chinese writer Liu Cixin, depicts the fate of civilizations as almost entirely dependent on winning grand races to scientific milestones. Someone in China’s leadership must have read that book, for Beijing has made winning the race to artificial intelligence a national obsession, devoting billions of dollars to the cause and setting 2030 as the target year for world dominance. Not to be outdone, President Vladimir Putin of Russia recently declared that whoever masters A.I. “will become the ruler of the world.”

To be sure, the bold promises made by A.I.’s true believers can seem excessive; today’s A.I. technologies are useful only in narrow situations. But if there is even a slim chance that the race to build stronger A.I. will determine the future of the world — and that does appear to be at least a possibility — the United States and the rest of the West are taking a surprisingly lackadaisical and alarmingly risky approach to the technology.

The plan seems to be for the American tech industry, which makes most of its money in advertising and selling personal gadgets, to serve as champions of the West. Those businesses, it is hoped, will research, develop and disseminate the most important basic technologies of the future. Companies like Google, Apple and Microsoft are formidable entities, with great talent and resources that approximate those of small countries. But they don’t have the resources of large countries, nor do they have incentives that fully align with the public interest.

To exaggerate slightly: If this were 1957, we might as well be hoping that the commercial airlines would take us to the moon.