Dan Barker (born June 25, 1949) is a prominent American atheist activist who served as a Christian preacher and musician for 19 years but left Christianity in 1984. Barker, along with his wife Annie Laurie Gaylor, is the current co-president of the Freedom From Religion Foundation.[1] He has written numerous articles for Freethought Today, an American freethought newspaper. He is the author of several books including Losing Faith in Faith: From Preacher to Atheist.