Plato. Aquinas. Descartes. Kant. Freud.
These great thinkers continue to shape our culture today—affecting everything from public-policy decisions to world events, theology, the arts, education, and even everyday conversations.
In this classic work, the late R. C. Sproul provides an expert survey of history’s most influential streams of thought. He demonstrates that ideas are not just passing fads—they carry consequences that ripple across generations.
This book is a valuable guide for anyone seeking to grasp the profound impact of ideas and their enduring relevance.

