Work on the norms of belief in epistemology regularly starts with two touchstone essays: W.K. Clifford's "The Ethics of Belief" and William James's "The Will to Believe." Discussing the central themes from these seminal essays, explores the history of the ideas governing evidentialism. As well as Clifford's argument from the examples of the shipowner, the consequences of credulity and his defence against skepticism, this book tackles James's conditions for a genuine option and the structure of the will to believe case as a counter-example to Clifford's evidentialism. Exploring the question of whether James's case successfully counters Clifford's evidentialist rule for belief, this study captures the debate between those who hold that one should proportion belief to evidence and those who hold that the evidentialist norm is too restrictive. More than a sustained explication of the essays, it also surveys recent epistemological arguments to evidentialism. But it is by bringing Clifford and James into fruitful conversation for the first time that this study presents a clearer history of the issues and provides an important reconstruction of the notion of evidence in contemporary epistemology.