Tristan Harris, a former Google Design Ethicist, became the tech industry's most prominent whistleblower by exposing how tech companies systematically use persuasive design techniques — pull-to-refresh (slot machine psychology), infinite scroll, notification bombardment, and social approval loops — to maximize engagement regardless of user wellbeing. His 2017 presentation 'A Handful of People Working at a Handful of Tech Companies Steer the Thoughts of Billions' became the basis for Netflix's 'The Social Dilemma.' Harris co-founded the Center for Humane Technology.