Recognized worldwide as a leading Christian philosopher, Plantinga probes what exactly is meant by the claim that religious -- and specifically Christian -- belief is irrational and cannot sensibly be held. He argues that the criticisms of such well-known atheists as Richard Dawkins, Daniel Dennett, Sam Harris, and Christopher Hitchens are completely wrong. Finally, Plantinga addresses several potential "defeaters" to Christian belief -- pluralism, science, evil and suffering -- and shows how they fail to successfully defeat rational Christian belief.