Mr. D'Arpino's dilemma -- Dr. Collins's conversion -- A skeptic's journey -- Patternicity -- Agenticity -- The believing neuron -- Belief in the afterlife -- Belief in god -- Belief in aliens -- Belief in conspiracies -- Politics of belief -- Confirmations of belief -- Geographies of belief -- Cosmologies of belief -- Epilogue: the truth is out there

Shermer demonstrates how our brains selectively assess data in an attempt to confirm the conclusions (beliefs) we've already reached. Drawing on evolution, cognitive science, and neuroscience, he considers not only supernatural beliefs but political and economic ones as well