[1][2] He is an ordained Humanist rabbi, and has been influential in American humanism as a blogger, spokesperson, adviser and author of the New York Times bestseller Good Without God: What a Billion Nonreligious People Do Believe.
Finding that so-called Eastern religions do not necessarily have greater access to truth than Western ones, Epstein returned to the U.S. and shifted his focus to rock music, recording and singing professionally for a year after college.
In the years since then, he has raised nearly $3 million in gifts and pledges to the organization, while organizing and launching a range of new programs and initiatives, including opening the Humanist Hub, a 3,200-square-foot (300 m2) "Center for Humanist Life" in Harvard Square, where members are encouraged to "connect with other people, act to make the world better, and evolve as human beings."
While at Harvard, Epstein has blogged for CNN,[6] Newsweek and The Washington Post; and his work as a Humanist rabbi and chaplain has been featured by ABC World News with Diane Sawyer.
From 2007 to 2010, he chaired the Advisory Board of the national umbrella organization the Secular Student Alliance, joining such renowned nonbelievers as Richard Dawkins and Christopher Hitchens.
His duties include encouraging non-religious students to give deep consideration to the societal impact of the entrepreneurial ventures they may go on to launch.