Aquinas: A Beginner's Guide

This accessible introduction to Thomas Aquinas presents his philosophical theology as a sophisticated system directly relevant to contemporary debates about God's existence. Feser reconstructs Aquinas's arguments to demonstrate their continued philosophical power against modern materialism and atheism, positioning thirteenth-century Thomism as a formidable alternative to post-Enlightenment naturalism.

The work systematically expounds Aquinas's metaphysical framework, beginning with his theory of act and potency, the distinction between essence and existence, and the four causes. Feser emphasizes how these concepts underpin Aquinas's natural theology, particularly the Five Ways. Unlike many introductions that treat these proofs as museum pieces, Feser argues they remain philosophically compelling when properly understood within their original Aristotelian-Thomistic context. He devotes considerable attention to defending the arguments against common misunderstandings, particularly those stemming from post-Humean empiricism and mechanistic views of causation.

Central to Feser's presentation is the claim that modern philosophy's rejection of formal and final causes renders it incapable of adequately addressing fundamental questions about reality, mind, and morality. He argues that Aquinas's essentialism and teleological understanding of nature provide superior explanations for phenomena that contemporary naturalism struggles to accommodate, including consciousness, intentionality, and objective moral values. The work explicitly challenges New Atheist critiques, particularly those of Richard Dawkins and Daniel Dennett, arguing they attack caricatures rather than engaging Aquinas's actual positions.

Feser's methodological approach combines historical exposition with philosophical argumentation. While presenting Aquinas's thought accurately, he actively defends its truth, making this more than merely descriptive scholarship. The work engages contemporary analytic philosophy, showing how Thomistic insights address current debates in philosophy of mind, ethics, and natural theology. Feser particularly emphasizes how Aquinas's conception of God as pure actuality and existence itself differs radically from anthropomorphic conceptions targeted by modern atheists.

The monograph contributes to the God debate by demonstrating that classical theism, properly understood, withstands contemporary naturalistic challenges. Feser contends that the mechanistic worldview underlying most modern atheism is philosophically inadequate, while Aquinas's synthesis of Aristotelian philosophy and Christian theology offers a more comprehensive account of reality. This rehabilitation of scholastic philosophy serves both to correct historical misunderstandings and to present theism as philosophically superior to its naturalistic alternatives. The work thus advances a robustly theistic position through rational philosophical argument.