Toby David Godfrey Ord is an Australian philosopher. He founded Giving What We Can in 2009, an international society whose members pledge to donate at least 10% of their income to effective charities, and is a key figure in the effective altruism movement, which promotes using reason and evidence to help the lives of others as much as possible. He is a Senior Research Fellow at the University of Oxford's Future of Humanity Institute, where his work is focused on existential risk. His book on the subject The Precipice: Existential Risk and the Future of Humanity was published in March 2020.