A trial kicking off this week in Los Angeles will weigh one of the most fraught questions of the digital age: whether social media giants are responsible for harming children.

TikTok reached an agreement late Monday to settle a lawsuit over claims that social media companies had engineered their products to hook young users, avoiding the first in a series of landmark trials...

"This is the first time that a social media company has ever had to face a jury for harming kids," Social Media Victims Law Center founder Matthew Bergman, whose team is involved in more than 1,000 su...