Gregory B. Sadler - That Philosophy Guy
A former philosophy professor's video lecture series breaking down classic philosophical texts and concepts for students and lifelong learners.
This is a digital classroom, not a conversational podcast. Dr. Sadler delivers solo lectures, often standing before a chalkboard, systematically unpacking core concepts from primary philosophical texts. The channel is a vast, free library of university-level material, covering figures from Plato to John Searle. It also features a recurring series of in-depth, critical book reviews.
“Unlike most philosophy podcasts, this is a structured, solo-lecture series. The 'Core Concepts' format—dedicating each short video to a single, specific idea from a larger work—provides a uniquely systematic and granular way to study the history of philosophy.”
Who hosts this show
Dr. Gregory B. Sadler is a former academic who now works to make complex philosophical ideas accessible to a wide audience. After a decade in traditional academic roles, he founded his own company, ReasonIO, to put philosophy into practice through public speaking, consulting, and coaching. He is an APPA-certified philosophical counselor, author, and ethics trainer.
Credentials & credits
- PhD in Philosophy, Southern Illinois University Carbondale
- APPA-certified Philosophical Counselor
- Adjunct Professor, Milwaukee Institute of Art and Design
- Author
- Ethics Trainer
- Executive Coach
Other ventures
- ReasonIO (Consulting & Tutoring)
- Substack Newsletter
- Patreon
- Teachable Online Courses
- Editor of Stoicism Today (2016-2022)
- Cameo
What kind of podcast
- Country
- United States
- Region
- usa
When new episodes drop
- 01
- 02John Gray, Seven Types Of Atheism | Sadler's Honest Book ReviewsJun 26, 2026 · 46 min
- 03
- 04
- 05
- 06
- 07
- 08
Notable episodes
- 01John Searle, Minds Brains, and Programs | Why People Think AIs Think
A prime example of the 'Core Concepts' format, where Sadler methodically breaks down a single, complex argument from a key philosophical paper.
- 02John Gray, Seven Types Of Atheism | Sadler's Honest Book Reviews
Showcases the 'Honest Book Reviews' series, demonstrating Sadler's critical but fair analysis of contemporary philosophical works.
- 03Ideas That Matter | A Conversation With Matthew Sharpe About Philosophy As A Way Of Life
An example of the channel's less frequent interview format, showing how Sadler engages with other contemporary thinkers on practical philosophy.
What you'll be asked on this show
The provided evidence consists almost entirely of solo lectures, which is the show's main format. Therefore, the host's specific interviewing techniques cannot be detailed. The show is explicitly not a typical interview show, though occasional one-on-one conversations do occur in a separate series.
The primary format is a solo lecture, with Dr. Sadler speaking directly to the audience in an academic but accessible tone, often using a chalkboard to outline arguments. [eBy5xuqYzHM] While the majority of episodes are lectures, the channel also includes a separate, less frequent series of long-form one-on-one interviews with other academics called 'Ideas That Matter'. [C0utN4I6FAA]
Signature segments
- · Philosophy Core Concepts
- · Sadler's Honest Book Reviews
- · Chalkboard Explanations
- · Ideas That Matter (Interview Series)
- · Monthly AMA (Ask Me Anything) Sessions
Topics covered repeatedly
Who gets booked here
When guests are featured, they are typically fellow academics, authors, or public intellectuals discussing their own work and its connection to philosophical ideas.
- Matthew Sharpeon Ideas That Matter | A Conversation With Matthew Sharpe About Philosophy As A Way Of Life
Where to find this show
Audience & reach
The channel is primarily viewer-funded through Patreon and Buy Me A Coffee. Supporters are credited as "Particular Backers" in videos, indicating a direct, community-based funding model rather than reliance on corporate sponsors. [eBy5xuqYzHM, jgK-fAjehos]
Subscriber and view counts are pulled live from YouTube and re-verified on a 30-day cycle. Listener estimates for the RSS feed aren't published here unless they're host-verified.
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People also ask
- What is Gregory B. Sadler's real name?
- Gregory B. Sadler is his real name.
- What are Dr. Sadler's credentials?
- Dr. Sadler holds a Ph.D. in Philosophy from Southern Illinois University Carbondale and is an APPA-certified philosophical counselor. He has taught at multiple institutions, including the Milwaukee Institute of Art and Design.
- What is the format of the show?
- The channel primarily features solo video lectures where Dr. Sadler explains concepts from philosophical texts. He also has a series for book reviews and occasional long-form interviews.
- Is this channel still active?
- Yes, new videos are uploaded almost daily.
- Where can I find his other work?
- Dr. Sadler runs a consultancy called ReasonIO, has a Substack newsletter, online courses on Teachable, and is active on Patreon.
- Is this an interview podcast?
- No, it is primarily a solo lecture series. While there is an occasional interview series called 'Ideas That Matter', the vast majority of content is lecture-based.
Built from the show's public RSS feed, YouTube, the host's own websites, and the cited sources below. Computed and AI-extracted fields are labelled. Facts only — no private info, no fabrication, no transcripts republished.
Sources & how this page was built
This page is AI-assisted, grounded in the public sources cited below, and host-verifiable. We publish facts only; we do not republish transcripts. If anything here is wrong, the host can claim and correct the page above.Model: gemini-2.5-pro · high confidence
- [01]Gregory Sadler - Milwaukee Institute of Art and Design Faculty Pagemiad.edu
- [02]Gregory B Sadler - PhilPeople Profilephilpeople.org
- [03]Gregory Sadler - APPA Practitioner Profileappa.edu
- [04]ReasonIO | putting philosophy into practicereasonio.wordpress.com
- [05]Gregory B. Sadler - Substackgregorybsadler.substack.com
- [06]Gregory B. Sadler - That Philosophy Guy (YouTube Channel)youtube.com
- [07]Gregory B. Sadler - Patreonpatreon.com
- [08]About Dr. Sadler - Orexis Dianoētikēgregorybsadler.blogspot.com
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