Buildings are engulfed in flames as a wildfire ravages Talent, Ore., on Sept. 8, 2020. Unfounded rumors that left-wing activists were behind the fires went viral on social media, thanks to amplification by conspiracy theorists and the platforms’ own design.

Buildings are engulfed in flames as a wildfire ravages the central Oregon town of Talent near Medford late Tuesday, Sept. 8, 2020. (Kevin Jantzer via AP)