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Official Website of Best-Selling Author, Christian Philosopher & Apologist


Christian Apologetics
2nd Edition 

2012 Christianity Today Award of Merit

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Dr. Groothuis is now a regular contributor for the Worldview Bulletin and recommends it!


Dr. Douglas Groothuis has fire in his bones for the Christian message and many irons in the fire to explain, defend, and apply that message. He has been explaining the world to the church and explaining the church to the world for nearly fifty years through his teaching, preaching, writing, mentoring, and general witness. His passion is to take to the streets the truth and significance of the Christian worldview for all of life. To that end, he publishes both academic and popular works, preaches in churches, gives public lectures, and engages in debates. Since 1983, he has appeared on hundreds of radio programs and podcasts. His students and peers regard him as a knowledgeable, sharp, and forceful yet gentle communicator of the Christian message. 


Dr. Groothuis holds a Ph.D. in Philosophy (University of Oregon, 1993) and is Professor of Philosophy at Denver Seminary where he heads the Christian Apologetics Master’s degree program. He is the author of nineteen books, beginning with the best-selling Unmasking the New Age (InterVarsity Press, 1986) and including the popular and voluminous textbook, Christian Apologetics, 2nd ed. (IVP Academic, 2022), as well as a poignant memoir, Walking Through Twilight: A Wife’s Illness—a Philosopher’s Lament (InterVarsity, 2017), an introduction to philosophy, Philosophy in Seven Sentences (InterVarsity, 2016), and a bold critique of Critical Race Theory, Fire in the Streets (Salem Books, 2022). He co-authored the introductory textbook on apologetics, The Knowledge of God in the World and in the Word (Zondervan-Academic, 2022) with Andrew Shepardson. His most recent book is World Religions in Seven Sentences (InterVarsity, 2023).

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Dr. Groothuis is a gifted communicator who has the ability to challenge scholars at the highest levels of academia while remaining accessible to those less academically inclined. He has spoken and preached about a wide range of topics, and with rapid changes in culture and politics, that range expands every year. Some of his strongest subjects include theistic arguments, attacks on Christianity (New Atheism and similar movements), non-Christian spiritualities, cultural and social criticism, comparative religion, C.S. Lewis, Blaise Pascal, ethics, philosophy of technology, political philosophy, philosophy of jazz, and aesthetics.



Truth Tribe with Douglas Groothuis is a podcast dedicated to finding the truth through reason, and evidence about what matters most. Our subjects include how to defend the Christian faith (through apologetics), biblical ethics, and social issues.

    Knowledge of God in the World and the Word  Video Lectures 

featured Books


"Douglas Groothuis has done more than most philosophers in the past three decades to bring real wisdom into people’s lives. He will enliven your group with the insights of the ages on issues that matter now. Highly recommended!"


Author of True Success, If Aristotle Ran General Motors, and The Oasis Within


upcoming Events

"Transgender Insanity and Biblical Truth"
"Transgender Insanity and Biblical Truth"
Jul 19, 2023, 12:00 PM MDT
10667 Park Ridge Ave, Longmont, CO 80504, USA
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