More than a dozen top scientists from seven countries are calling for world governments to adopt a moratorium on what scientists call heritable genome editing. They’re on a mission to make sure the world doesn’t see any more gene-edited babies — not till we’re good and ready — and they’ve got a plan to stop it.

The group penned a commentary published Wednesday in the journal Nature. The effort was led by Eric Lander, director of the Broad Institute and a professor at both MIT and Harvar