Reasonable Faith
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The site of philosopher and theologian William Lane Craig, collecting his articles, debate transcripts, Q&A columns and podcasts defending Christian theism. Explicitly apologetic rather than neutral, so it is best read as a primary source for one side of the arguments.
More resources on Philosophy of Religion
iep.utm.edu/religion
The Religion page on the Internet Encyclopedia of Philosophy provides a concise, peer‑reviewed overview of religion from a philosophical standpoint, covering definitions, the nature and variety of religion, major debates, and key concepts and figures in philosophy of religion.
plato.stanford.edu/entries/philosophy-religion
An open-access, scholarly article from the Stanford Encyclopedia of Philosophy providing an in-depth overview of philosophy of religion, covering core questions, major debates, historical development, and extensive bibliographies for further study.
Philosophy of Religion: An Introduction
A standard undergraduate textbook working through arguments for and against God's existence, cosmological, ontological, design, and the problem of evil, alongside faith, reason, and religious experience, with each position stated in its strongest form.
History of Philosophy
The University of Edinburgh's fourteen-module survey, taught by nine researchers, covering epistemology, philosophy of science, mind, morality, political obligation, and free will. Students come away able to state each field's core problem and follow the standard arguments on both sides.
God and Other Minds
Plantinga's 1967 debut examines the classical arguments for and against God's existence, then argues by analogy with our belief in other minds that theistic belief can be rational without proof, the seed of reformed epistemology.