The impact of upcoming AI legislation hinges on how officials define key terms like “frontier model” and “reasonable measures.”

Are IEEPA tariffs permitted as either a lesser form of an embargo or the equivalent of a license fee? In short: no.

A very strange document.

Even absent an order to “kill everybody,” the Trump administration’s actions—like its broader military campaign—raise serious legal concerns that demand further scrutiny.

The optimistic era of climate diplomacy, epitomized by the 2015 Paris Agreement, has given way to a more fragmented world in which climate change has taken a back seat.

Adversaries are using new technologies to disrupt commercial flight without escalating to broader conflict.

Your weekly summary of everything on the site.

I took a ride to Palo Alto in a Jaguar with a robot driver.

The plaintiffs argue the government is disfavoring speech it disagrees with. The government barely disputes that.

A review of Eliezer Yudkowsky and Nate Soares, “If Anyone Builds It, Everyone Dies: Why Superhuman AI Would Kill Us All” (Little, Brown and Company, 2025).

The latest edition of the Seriously Risky Business cybersecurity newsletter, now on Lawfare.