Discusses the ideas and impact of 27 atheists, agnostics, and secularists whose ideas have shaped society over the last 200 years.Included are alphabetically arranged entries on 27 iconic figures of unbelief, such as:Charles BradlaughRichard DawkinsDaniel C. DennettAlbert EinsteinThe ExistentialistsThe Founding FathersSigmund FreudSam HarrisRobert G. IngersollFriedrich NietzscheMadalyn Murray O'HairMark TwainVoltaire