Kreeft joined the philosophy faculty of the Department of Philosophy of Boston College in 1965.[9] He has debated several academics in issues related to God's existence. Shortly after he began teaching at Boston College, he was challenged to a debate on the existence of God between himself and Paul Breines, an atheist and history professor, which was attended by a majority of undergraduate students. Kreeft later used many of the arguments in this debate to create the Handbook of Christian Apologetics with then undergraduate student Ronald K. Tacelli.[citation needed]
In 1971, Kreeft published an article titled "ZenInHeidegger's 'Gelassenheit'" in the peer-reviewed journal International Philosophical Quarterly, of Fordham University. In 1994, he was an endorser of the document "Evangelicals and Catholics Together".[10] He also formulated, with R. Tacelli, "Twenty Arguments for the Existence of God".[11]
Kreeft converted to Catholicism during his college years.[12] A key turning point came when he was asked by a Calvinist professor to investigate the claims of the Catholic Church that it traced itself to the early Church. He said that, on his own, he "discovered in the early Church such Catholic elements as the centrality of the Eucharist, the real presence, prayers to saints, devotion to Mary, an insistence on visible unity, and apostolic succession."[13]
The "central and deciding" factor for his conversion was "the Church's claim to be the one Church historically founded by Christ."[13] He reportedly applied C. S. Lewis's trilemma (that either Jesus is a lunatic, a liar, or the Lord): "I thought, just as Jesus made a claim about His identity that forces us into one of only two camps ... so the Catholic Church’s claim to be the one true Church, the Church Christ founded, forces us to say either that this is the most arrogant, blasphemous and wicked claim imaginable, if it is not true, or else that she is just what she claims to be."[14]
According to Kreeft's personal account, his conversion to Catholic Christianity was influenced by, among other things, Gothic architecture and Thomistic philosophy, the writings of St. John of the Cross, the logic of asking saints to pray for us, and a visit to St. Patrick's CathedralinNew York City when he was twelve years old, "feeling like I was in heaven ... and wondering why, if Catholics got everything else wrong, as I had been taught, they got beauty so right..."[15]
Although a Catholic, he places central emphasis on the unity between Catholics and Protestants.[16]
Between Heaven and Hell (1982) — A Dialog with John F. Kennedy, C. S. Lewis, and Aldous Huxley
The Unaborted Socrates (1983) — Socratic dialogue on abortion
The Best Things in Life (1984) — Twelve Socratic dialogues on modern life
Yes or No? (1984) — Straight Answers to Tough Questions about Christianity
Making Sense Out of Suffering (1986)
Fundamentals of the Faith, Essays in Christian Apologetics (1988)
Heaven, the Heart's Deepest Longing (1989)
Everything You Ever Wanted To Know About Heaven... But Never Dreamed of Asking (1990)
Making Choices: Practical Wisdom for Everyday Moral Decisions (1990)
Summa of the Summa (1990) — Summa Theologica edited and explained for beginners
Three Philosophies of Life (1990) — Ecclesiastes (life as vanity), Job (life as suffering), Song of Songs (life as love)
Prayer: The Great Conversation (1991) — Straight answers to tough questions
Back to Virtue (1992) — Reprint of For Heaven's Sake: The Rewards of the Virtuous Life (1986)
Shorter Summa (1993) — Shorter version of Kreeft's Summa of the Summa
Christianity for Modern Pagans: Pascal's Pensees (1993)
Your Questions, God's Answers (1994) — Solid responses for Catholic teens
Handbook of Christian Apologetics (with Ronald K. Tacelli) (1994)
C. S. Lewis for the Third Millennium (1994) — Six essays on Lewis' Abolition of Man
Shadow-Lands of C.S. Lewis: The Man Behind the Movie (1994)
Handbook of Christian Apologetics (Pocket Version) (1994)
The Angel and the Ants: Bringing Heaven Closer to Your Daily Life (1994)
Talking to Your Children About Being Catholic (1995) — A treasure trove of ideas
Angels (and Demons): What Do We Really Know About Them? (1995)
Ecumenical Jihad: Ecumenism and the Culture Wars (1996)
The Journey A Spiritual Roadmap For Modern Pilgrims (1996)
The Snakebite Letters Devious Secrets for Subverting Society (1998)
Refutation of Moral Relativism — Dialogues between a relativist and absolutist (1999)
Prayer for Beginners (2000)
Catholic Christianity (2001)
Socrates Meets Jesus (1987/2002) — Socratic dialogue with students of Harvard University's Divinity School
How to Win the Culture War: A Christian Battle Plan for a Society in Crisis (2002)
Celebrating Middle Earth: Lord of the Rings (2002) — On western civilization
Three Approaches to Abortion (2002)
Philosophy 101 by Socrates (2002) — An introduction to philosophy via Plato's Apology
Socrates Meets Machiavelli (2003) — Socratic dialogue between Socrates and Machiavelli
Socrates Meets Marx (2003) — Socratic dialogue between Socrates and Karl Marx
The God Who Loves You (2004)
Socratic Logic (2005) — A textbook on classical logic
You Can Understand the Bible (2005) — a combination of his previous books You Can Understand the Old Testament: A Book-by-Book Guide for Catholics (1990) and Reading and Praying the New Testament: A Book-by-Book Guide for Catholics (1992)
Socrates Meets Sartre: Father Of Philosophy Meets The Founder of Existentialism (2005) — Socrates and Jean-Paul Sartre
The Philosophy of Tolkien: The Worldview Behind "The Lord of the Rings" (2005)
The Sea Within (2006)
Socrates Meets Descartes (2007) — The Father of Philosophy Analyzes the Father of Modern Philosophy's Discourse on Method
The Philosophy of Jesus (2007) — On the wisdom of Jesus
Pocket Guide to the Meaning of Life (2007)
Before I Go (2007) — Letters to Children About What Really Matters
I Surf Therefore I Am (2008) — An exploration of Surfing
Because God Is Real: Sixteen Questions, One Answer (2008)
Jesus-Shock (2008)
Socrates Meets Kant (2009) — The Father of Philosophy Meets His Most Influential Modern Child
If Einstein Had Been a Surfer (2009) — A Philosophy of Surfing
Between Allah & Jesus: what Christians Can Learn from Muslims (2010)
Socrates Meets Hume (2010) — The Father of Philosophy Meets the Father of Modern Skepticism
An Ocean Full of Angels (2011)
Summa Philosophica (2012) — 110 Key Questions in Philosophy
Jacob's Ladder (2013) — Ten Steps to Truth
Charisms: Visions, Tongues, Healing, etc. (feat. Dave Nevins) (2013) — catalysts to "two-way" interactive prayer
Socrates Meets Kierkegaard (2014) — Questions the founder of Christian existentialism
52 Big Ideas (2020) — From 32 Great Minds
Practical Theology (2014) — Spiritual Direction from Aquinas
Letters to an Atheist (2014) — Wrestling with Faith
The Philosopher's Bench (2015)(DVD) — Catholic philosophers Peter Kreeft and Thomas Howard bring philosophy to the 'man in the street'
I Burned for Your Peace: Augustine's Confessions Unpacked (2016) — Snippets and commentary from one of the most beloved books in the world
How to Be Holy (2016) — First Steps in Becoming a Saint
Catholics and Protestants (2017) — What Can We Learn from Each Other?
Between One Faith and Another (2017) — Engaging Conversations on the World's Great Religions
Forty Reasons I am a Catholic (2018)
Doors in the Walls of the World (2018) — Signs of Transcendence in the Human Story
The Platonic Tradition (2018) 8 lectures "for beginners" on the essence of the Platonic tradition throughout philosophical history
Socrates' Children, 4 vols. (2019) — The 100 Greatest Philosophers
How To Destroy Western Civilization And Other Ideas From The Cultural Abyss (2021)
^"Kreeft Chosen For Fellowship", Ridgewood Herald-News, March 12, 1959. Accessed December 27, 2023, via Newspapers.com. "Peter J. Kreeft of 760 Frederick Court has been chosen as a Woodrow Wilson Fellow for the 1959-1980 year and will enter Yale University to do graduate work in philosophy in September. He Is now student at Calvin College."
