Samuel Benjamin Harris, born April 9, 1967, is an American philosopher, neuroscientist, author, and podcast host. His work spans a broad array of topics, including rationality, religion, ethics, free will, neuroscience, meditation, psychedelics, philosophy of mind, politics, terrorism, and artificial intelligence. Harris emerged as a significant figure for his critiques of religion, earning him a place as one of the "Four Horsemen" of New Atheism, alongside Richard Dawkins, Christopher Hitchens, and Daniel Dennett.

Harris's literary debut, The End of Faith (2004), secured the PEN/Martha Albrand Award for First Nonfiction and enjoyed a 33-week tenure on The New York Times Best Seller list. He has authored six additional books: Letter to a Christian Nation (2006), The Moral Landscape: How Science Can Determine Human Values (2010), Lying (2011), Free Will (2012), Waking Up: A Guide to Spirituality Without Religion (2014), and Islam and the Future of Tolerance: A Dialogue (2015, co-authored with British writer Maajid Nawaz). His works have been translated into more than 20 languages, sparking both acclaim and controversy, including allegations of Islamophobia, which Harris and his advocates contest.

Harris has engaged in public debates with notable figures on themes surrounding God or religion. He also hosts the Making Sense podcast, formerly known as Waking Up, which commands a large following. In 2018, he launched the meditation app, Waking Up with Sam Harris. Initially aligned with the "intellectual dark web," Harris has distanced himself from this association.