Os Guinness is an author and social critic. Born in China in World War Two where his parents were medical missionaries, he was a witness to the climax of the Chinese revolution in 1949. He was educated in England, where he completed his undergraduate degree at the University of London and his D.Phil in the social sciences from Oxford University. Os has written or edited more than thirty books, including The Call, Unspeakable, A Free People’s Suicide, The Global Public Square, and The Magna Carta of Humanity. His latest book is Zero Hour America, published in 2022.

Os has been a Guest Scholar at the Woodrow Wilson Center for International Studies, a Guest Scholar and Visiting Fellow at the Brookings Institution, and Senior Fellow at the Trinity Forum. Always passionate about religious freedom, he was the lead drafter of the Williamsburg Charter in 1988, a bicentennial celebration of the bicentennial of the US First Amendment, and later a drafter of “The Global Charter of Conscience,” published at the European Union Parliament in 2012. He lives with his wife Jenny in the Washington DC area.