My new book, Good Thinking: What you need to know to be smarter, safer, wealthier, and wiser, is now in bookstores and available from online booksellers.


Buy the book now!


Barnes and Noble   

BAM!  (Books-A-Million) 

Powell's Books 




t  Guy talks about brains and Good Thinking in this recent interview with CNS. 


Praise for Good Thinking: What you need to know to be smarter, safer, wealthier, and wiser  


“Harrison proves himself an excellent guide to reasonable thought in the 'swirling, festering ball of lies and madness' that is the modern world.”

 Publishers Weekly, August 3, 2015

“For all our vaunted intelligence, we human beings believe some really bizarre things. Guy P. Harrison takes us on a judicious, wide-ranging, and entertaining tour of the many dimensions of human mental weirdness, pointing out where we need to be particularly on guard against our poor decision-making processes.”
—Ian Tattersall, curator emeritus, American Museum of Natural History


“In this important, beautifully written, and well-researched book, Guy P. Harrison gives us the key tools we need to understand how our brains work, how best to use them, and how to take care of them. With clarity, eloquence, and unbridled passion, Harrison makes a compelling case for skepticism and critical thinking, and shows us why it is of vital importance to our species.”
—Julien Musolino, associate professor of psychology and cognitive science, Rutgers University 







n Contact me at   



Book links 

n  Amazon page for my latest book, Good Thinking: What you need to know to be safer, smarter, wealthier, and wiser (Prometheus Books). 

n My Amazon author page with information about all my books. 

n Here is the page with my books at Barnes and Noble 

n My author page at Penguin/Random House. 



n Random House selected Think: Why you should question everything  for its First Year Experience/CommonReads program, making it recommended reading for all first-year university students. I spoke and signed books at the recent 33rd annual First Year Experience Conference in California.

n San Diego's largest newspaper, The Union Tribune, named Think: Why you should question everything a "book of note" 

n Canada's largest newspaper, The Toronto Star, praises Think in this article.   

n A Japanese translation  of Think: Why you should question everything is now on sale in Japan. 

n An Italian translation of my book, 50 Reasons People Give for Believing in a God has been published in Italy




n Read this excellent review  of Think: Why you should question everything published in Skeptical Inquirer.    

n "Bogus, Bunk, and B.S.", an outstanding review  of 50 Popular Beliefs that People Think are True published in Skeptic magazine.  

n Read Skeptical Inquirer's great review  of 50 Popular Beliefs That People Think are True.     



Interviews and talks 

"Harrison's New Book Explores the Brain, Faulty Thinking", Q and A with Cayman News Service

n My interview on Skepticality, the official audio show of Skeptic magazine (I come in at the 22 minute mark). 

The Humanist Hour, "Good Thinking with Guy P. Harrison"  (audio)

Here is a short video of my talk on science and skepticism at an event hosted by Random House at the 33rd annual First Year Experience Conference in California.

n  "Book Questions Popular Beliefs" , Union Tribune (San Diego's largest newspaper) interview about my book, 50 Popular Beliefs that People Think are True    

n  Q and A interview  with the Promethean about skepticism and thinking like a scientists in daily life. 



Social media 

n If you dwell in these worlds, please "like" my Facebook author page  and follow me on Twitter.    



More links

n I am an "expert blogger" for Psychology Today. Read essays here

n Guy Harrison Wikipedia page  with biographical information.



A brief thought about the 2015 Paris attacks, those before, and those to come


To embrace irrational beliefs or look the other way in silence while those around you embrace irrational beliefs sets the stage for inevitable destruction in the name of nonsense. If most humans believe idiotic ideas and crazy claims, then some minority of humans will go too far with them. Bombs and bullets won't solve this problem. Only good thinking can. It's a long-term solution but the only one that will work. Think, doubt, and question everything. Change your mind when evidence demands it. Encourage science education, demand honesty, and expect intellectual progress. Reject superstition and bad traditions. In short, wake up and grow up.  

Achieving a world without religious terrorism requires us to first raise a generation of children who know how to think their way through lies and delusions.


-Guy P. Harrison, marooned in the 21st century







Explore About Thinkingmy Psychology Today blog


l "What Can We Learn from Ben Carson's Brain" Academic and professional achievements do not guarantee Good Thinking

l "Interview with The Martian"  Andy Weir, author of the book behind the moive, talks space and more

l "Cat Got Your Brain?"  A bizarre parasite might be influencing your behavior and maybe even human history

l Four Simple Reasons Smart People Shouldn't Believe in Races 

l A 21st Century Thinker's Reading List

l What’s Wrong—and Right—With Alternative Medicine

l How to Talk About Religious Beliefs Without Sounding Silly




A few words about thinking

One of the biggest mistakes we can make in life is to ignore or deny the possibility that we might be dead wrong about something that is very important to us.

Don’t do this!

Question everything. Embrace doubt. Second guess conclusions. Be humble; after all you could be wrong. You might be the first perfect person in all of history and prehistory who is incapable of being fooled by the mistakes, lies and delusions of others. But I doubt it. You might be the first ever to rise above and see through all the deceptive quirks, traps and biases that come standard with a human brain. But I doubt it.

What good is it to hold tight to a position against every challenge if that position is in error? The goal is not to avoid ever changing your mind. The goal is to be right, or as close to it as you can be. If you value wisdom and honesty then you ought to value skepticism. Wisdom is recognizing that you don’t know everything and can be fooled just like every other human who has ever lived. Wise people change their minds when evidence demands it. Honest people don’t pretend to know things that they don’t know.

This fundamental error in thinking crops up most often in politics and religion, of course. These two fertile fields of human thought, passion and silliness encourage if not demand that participants sacrifice their ability to think independently. This treasure is given away freely as rigid lines are drawn and feet set in cement. How can something of such value—the ability and the courage to think freely—be sacrificed by so many people with so little reluctance? Why the haste to become one more zombie in the mob? Why no remorse for the loss of so much humanity?

Do not undervalue your ability to think independently, to grow intellectually over a lifetime, and to always do your best to move closer to truth and reality. The warmth of mindless membership may be appealing at a glance but it’s fool’s gold.

Change. Grow. Improve. Think and be fully human.


—Guy P. Harrison