Toby Ord — Notable For: The Precipice; existential risk quantification; effective altruism

NoteThe source directly confirms all three elements of the claim: (1) 'The Precipice' is explicitly mentioned as his book; (2) effective altruism is confirmed through his co-founding of Giving What We Can and the 'wider effective altruism movement'; (3) existential risk quantification is confirmed through his research on long-term risks to humanity and his role at the Future of Humanity Institute. The source material is from Giving What We Can's official people page, which is a reliable primary source for biographical information about Toby Ord.