In the 1930s and 1940s, America played a crucial role in keeping academic inquiry alive. By welcoming thousands of researchers fleeing fascism in Europe, it enhanced its national brainpower and fostered breakthroughs of immense value to people everywhere — from the digital computer to the discovery of DNA.

Now it’s in the process of throwing that priceless legacy away. If wiser minds don’t prevail, one can only hope Europe and others will step into the breach.

Establishing itself as a haven of academic freedom was among the smartest moves the U.S. ever made. Its unrivaled collection of research universities attracts top global talent, fostering innovation that enriches the nation.

By some estimates, each dollar spent on research and development generates $5 or more in social benefits, such as higher productivity and better living standards. It’s by far the most profitable form of public investment.

Yet the White House now seems bent on destruction. Citing (among other things) rising antisemitism on college campuses, it has withheld billions of dollars from the likes of Harvard and Columbia, forcing them to terminate projects, lay off researchers and limit graduate-school admissions.

It has proposed tens of billions in budget cuts at federal agencies such as the National Institutes of Health and the National Science Foundation. It has detained foreign academics and — most recently — sought to block enrollment of international students.

The repercussions promise to be devastating. The economic damage could exceed that of the recession of 2008. Projects in areas ranging from climate science to medicine have shut down. An exodus looms: Three-fourths of U.S.-based scientists who responded to a recent Nature poll said they were seeking a way out, with Europe and Canada the top destinations. By one estimate, up to a fifth of postdoctoral students at elite U.S. universities have studied in the European Union and hence might be amenable to moving.

Rival research centers are jumping at the opportunity. As Bloomberg News has reported, countries including Australia, Canada, Denmark and Norway are offering funding, streamlined visas and other perks to lure top academics. Germany has invited Harvard to set up an “exile campus.” The EU has launched a €500 million “Choose Europe” program.

These efforts are welcome, to the extent that they keep crucial work going. Yet the funds so far committed pale in comparison to the potential cuts in the U.S. If America abdicates, Europe in particular will need to be much more ambitious.

A better option would be for the U.S. to come to its senses. Legislators should reject the false economy of slashing public research funding. Courts should issue injunctions where the administration’s actions have violated the law or the Constitution, as they plainly have in several cases. Researchers, alumni and industry groups should alert the public to the scale of potential damage ahead.

Universities, for their part, might consider some introspection. Although the administration’s actions are nuts, it’s true that too many schools have indulged antisemitic protesters who have created chaos on campus, obstructed learning and menaced their fellow students. Imposing zero-tolerance policies for such disruption might placate the White House; it’s also the right thing to do.

Amid the chaos, researchers will need to do their jobs as best they can. It’d be a truly spectacular act of self-harm if America managed to trigger an exodus of talent back across the Atlantic. If other countries rise to the occasion, its loss will be their gain.

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The Editorial Board publishes the views of the editors across a range of national and global affairs.

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