Supreme Court rules for Google, Twitter in closely watched cases

The Supreme Court ruled for Google and Twitter in a pair of closely watched liability cases Thursday, saying families of terrorism victims had not shown the companies “aided and abetted” attacks on their loved ones.

“Plaintiffs’ allegations are insufficient to establish that these defendants aided and abetted ISIS in carrying out the relevant attack,” Justice Clarence Thomas wrote in a unanimous decision in the Twitter case. The court adopted similar reasoning in the claim against Google.

The court’s narrowly focused rulings sidestepped requests to limit a law that protects social media platforms from...