John Robbins: Justification by faith alone is the article upon which churches and individuals stand or fall

John Robbins asserts that justification by faith alone was central to biblical and reformational theology:

Justification by faith alone was not just another topic in theology for Paul; it was the center of Christian theology, a sine qua non of Christian doctrine. The Reformers recognized its central place 1500 years later and declared that it was the doctrine by which churches, as well as individuals, stand or fall. (John Robbins, Why Heretics Win Battles)