Twitter, Inc. v. Taamneh
Headline: Court rejects families’ claims against major social‑media companies, ruling platforms’ passive hosting and recommendation algorithms do not constitute aiding and abetting ISIS without intentional, substantial assistance, limiting victims’ ability to sue.
Holding:
- Limits victims’ ability to sue platforms for terrorists’ independent attacks without proof of knowing, substantial assistance.
- Protects large social platforms from broad secondary liability based on passive hosting.
- Leaves open liability in cases with specific, systemic, or intentional platform conduct.
Summary
Background
The plaintiffs are family members of a victim killed in a 2017 ISIS attack at the Reina nightclub in Istanbul. They sued three major social‑media companies—Facebook, YouTube/Google, and Twitter—under the Antiterrorism Act. The complaint says ISIS used the platforms to post propaganda, recruit members, raise funds, and that the companies profited from ads placed with ISIS content. Plaintiffs also alleged the platforms used recommendation algorithms that matched ISIS content to likely viewers and that the companies knew about but did not remove enough offending material.
Reasoning
The Court asked whether the companies “aided and abetted” the specific terrorist act by knowingly providing substantial assistance. Relying on the Justice Against Sponsors of Terrorism Act and longstanding common‑law principles (as explained in Halberstam), the Court said aiding and abetting requires conscious, voluntary, culpable participation that meaningfully helps a wrongful act succeed. The Court found the allegations described passive hosting and algorithmic matching rather than intentional, substantial help tied to the Reina attack. Claims that the platforms profited from ads or failed to remove content did not plausibly show the companies knowingly provided the required substantial assistance.
Real world impact
The Court reversed the Ninth Circuit and dismissed these aiding‑and‑abetting claims at the motion‑to‑dismiss stage. Victims will generally need stronger, particularized facts tying a platform’s conduct to a specific terrorist act to proceed. The decision narrows when families can hold large platforms civilly liable for third‑party terror acts. Because the ruling was made without a full factual record, different evidence or allegations could produce a different outcome.
Dissents or concurrances
Justice Jackson concurred, emphasizing the opinions are narrow and that resolving cases at the motion‑to‑dismiss stage without a developed factual record means different allegations or a fuller record could lead to different results.
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