Zachary Karabell, an author and investor, writes “The Edgy Optimist” on Substack. His next book, “Fields of Invention: How We Made Corn and Corn Made Us,” will be published in 2027.

Bayer and the ordinary consumer won. The Make America Healthy Again movement and trial lawyers lost. That’s a simple heuristic for understanding the Supreme Court’s 7-2 decision last week in Monsanto v. Durnell. The upshot is that plaintiffs can’t sue the biotech company for not putting a cancer warning on the label of Roundup, the popular weed killer.