What is the question presented in Twitter, Inc. v. Taamneh?

1. Whether a defendant that provides generic, widely available services to billions of users and allegedly fails to take and enforce "meaningful" aggressive-content-removal policies to prevent terrorists from using those services has "knowingly provided substantial assistance" under 18 U.S.C. § 2333(d)(2), and is thus liable for an act of international terrorism. 2. Whether liability under Section 2333(d)(2) requires proof that the defendant provided substantial assistance to the specific act of international terrorism that injured the plaintiff.

Docket 21-1496

Twitter, Inc. v. Taamneh

In a unanimous decision, the Supreme Court ruled that social media platforms cannot be held liable for aiding and abetting international terrorism under 18 U.S.C. Section 2333 merely for failing to take more aggressive action to remove terrorist content.

Status: Decided
Appeal from: United States Court of Appeals for the Ninth Circuit
Argued: Feb 22, 2023
Decision released: May 18, 2023

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Case Accepted

Arguments HeardFeb 22, 2023

Decision ReleasedMay 18, 2023

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Page data last refreshed Mar 9, 2026.

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