The Neuroscience Of The 7 Deadly Sins | Dr Jack Lewis | Modern Wisdom Podcast 182

The Neuroscience Of The 7 Deadly Sins | Dr Jack Lewis | Modern Wisdom Podcast 182

Modern WisdomJun 11, 20202h 7m

Dr Jack Lewis (guest), Chris Williamson (host), Narrator, Narrator, Narrator

Evolutionary and neuroscientific basis of the seven deadly sinsAncient religious wisdom vs modern scientific understandingSocial consequences of excess pride, envy, wrath, greed, gluttony, lust and slothLoneliness, social isolation and their impact on physical and mental healthNarcissism and brain responses to social rejectionLust, sexual orientation, pedophilia and moral responsibilityTechnology, social media, envy and a proposed ‘eighth deadly sin’

In this episode of Modern Wisdom, featuring Dr Jack Lewis and Chris Williamson, The Neuroscience Of The 7 Deadly Sins | Dr Jack Lewis | Modern Wisdom Podcast 182 explores neuroscientist Explains How Ancient ‘Sins’ Map Onto Modern Brains Chris Williamson and neuroscientist Dr Jack Lewis explore the seven deadly sins through the lens of modern neuroscience, evolution and mental health. They argue that each ‘sin’ is actually a necessary human drive in moderation but becomes socially and personally destructive when taken to extremes. Lewis explains how brain circuits, especially those involved in pain and inner turmoil, underpin pride, envy, wrath and other vices, and how social isolation is a very real, measurable consequence. The conversation also contrasts ancient religious wisdom with contemporary science, discusses contentious topics like pedophilia and lust, and concludes by proposing an “eighth deadly sin”: unreflective overuse of technology.

Neuroscientist Explains How Ancient ‘Sins’ Map Onto Modern Brains

Chris Williamson and neuroscientist Dr Jack Lewis explore the seven deadly sins through the lens of modern neuroscience, evolution and mental health. They argue that each ‘sin’ is actually a necessary human drive in moderation but becomes socially and personally destructive when taken to extremes. Lewis explains how brain circuits, especially those involved in pain and inner turmoil, underpin pride, envy, wrath and other vices, and how social isolation is a very real, measurable consequence. The conversation also contrasts ancient religious wisdom with contemporary science, discusses contentious topics like pedophilia and lust, and concludes by proposing an “eighth deadly sin”: unreflective overuse of technology.

Key Takeaways

Each ‘deadly sin’ is a useful drive in moderation, catastrophic in excess.

Gluttony helps survival in food-scarce environments, greed can motivate effort, lust drives reproduction; but when any of these are unchecked they destroy relationships, reputations and well‑being, often leading to social isolation that literally shortens life expectancy.

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Ancient moral categories often anticipated modern neuroscience.

Religious thinkers identified recurring patterns of antisocial behavior (the capital vices) long before brain scanners; Lewis argues we shouldn’t discard these traditions, but use science to separate enduring wisdom from outdated supernatural framing.

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Narcissistic pride is tightly linked to heightened ‘pain’ responses in the brain.

fMRI studies show narcissists’ dorsal anterior cingulate cortex (DACC)—a key pain/anguish region—lights up more during social rejection, which helps explain their touchiness, constant need for validation, and tendency to overreact or seek revenge.

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We don’t control what sexually arouses us, only what we do about it.

Orientation and many sexual interests are not consciously chosen, as shown by objective arousal measures; moral responsibility lies in behavior—seeking help, setting boundaries and avoiding harm—not in having certain thoughts or urges.

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Greed and status envy are amplified—and distorted—by social media.

Platforms expose us to highly curated highlight reels that trigger malicious envy and a sense of injustice, even though many seemingly ‘successful’ people are privately miserable; Lewis suggests consciously interrogating whether someone is truly ‘worth’ envying.

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Rest, boredom and a ‘healthy sloth’ are essential for mental repair.

Short daily breaks, genuinely boring holidays and adequate sleep allow deep neural maintenance and insight; constant stimulation, hustling and packing every moment with activity undermine cognition, mood and long‑term performance.

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Unreflective overuse of technology may be a modern ‘eighth deadly sin’.

Endless scrolling, superficial information intake and phone preoccupation erode memory, empathy and deep understanding; Lewis suggests treating tech use like the other sins—beneficial in moderation, harmful when it crowds out real relationships and quiet thinking.

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Notable Quotes

They are perfectly natural human urges which, in extreme, cause absolute havoc in one's social relations.

Dr Jack Lewis (on the seven deadly sins)

Be careful who you envy because quite often the people that people typically envy project success... but actually behind the scenes, they've got a crushing horrible existence.

Dr Jack Lewis

We have no conscious control over what makes us feel sexually excited. Whether or not we act upon that temptation is a whole different matter.

Dr Jack Lewis

You do not serve others from your cup. You serve others from the saucer which overflows around your cup.

Aubrey Marcus, quoted by Chris Williamson

The journey is the destination... pursuing your hobbies is satisfying because you’re not trying to get anywhere apart from forwards.

Dr Jack Lewis

Questions Answered in This Episode

If each ‘sin’ is adaptive in moderation, how can individuals practically identify where their own behavior crosses the line from healthy drive into destructive excess?

Chris Williamson and neuroscientist Dr Jack Lewis explore the seven deadly sins through the lens of modern neuroscience, evolution and mental health. ...

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Given the neuroscience of narcissism and social pain, how should we respond to narcissistic people in our lives without enabling their behavior or demonizing them?

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What kind of clinical and societal framework would allow people with dangerous sexual urges (like pedophilia) to seek help safely before harm occurs?

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How can we redesign our relationship with technology and social media so that it enhances rather than erodes empathy, deep thinking and genuine connection?

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In a culture that glorifies hustle, productivity and wealth accumulation, what would it look like to normalize ‘virtuous sloth’ and contentment without encouraging complacency?

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Transcript Preview

Dr Jack Lewis

Be careful who you envy because quite often the people that people typically envy project success and that everything's great, but actually behind the scenes, are they really great? Is life really as gravy when they're back home? Quite often it's not the case, but we don't look into the backstory behind these people. There's loads and loads of people in the public eye who, when they roll out on stage, when they roll out in the studio in front of the lights and the TV cameras, they put, they put on a face that just exudes success. But actually behind the scenes, they've got a crushing, horrible existence, um, that they carefully hide from everyone. (airplane flying)

Chris Williamson

We're talking about sin today, all the, all the sins. How are you? Are you sinful today? Are you feeling sinful?

Dr Jack Lewis

No, I've been, I've been pretty virtuous, to be honest. I mean, lockdown sort of, uh, stops people going out and doing things that might get them in trouble, so I've been boringly virtuous.

Chris Williamson

How sinful can you be during a pandemic, you know?

Dr Jack Lewis

(laughs) Yeah, I mean that, uh, if you, if you take the drop-in A&E, um, visits, uh, it's just, you, you let, you can't even hurt yourself if you stay indoors.

Chris Williamson

(laughs)

Dr Jack Lewis

(laughs)

Chris Williamson

You put those little foam cups on all the sharp edges in your house.

Dr Jack Lewis

Exactly.

Chris Williamson

And you make sure that you take the steps carefully. That's it.

Dr Jack Lewis

And particularly during the period where the DIY shops were closed, it's like, I mean, how's anyone gonna chop their finger off on a bank holiday if they can't go and buy a scalpel?

Chris Williamson

Limes.

Dr Jack Lewis

Not a scalpel, a standing- a standing lime.

Chris Williamson

Cutting limes for mojitos, that's how.

Dr Jack Lewis

(laughs)

Chris Williamson

That's how you do it. Um, so talking about sin-

Dr Jack Lewis

Yeah.

Chris Williamson

...The Science of Sin, your new book.

Dr Jack Lewis

Yeah.

Chris Williamson

Science of Sin: Why We Do the Things We Know We Shouldn't.

Dr Jack Lewis

Mm-hmm.

Chris Williamson

So why, why do we do the things that we know that we shouldn't?

Dr Jack Lewis

Because we're human.

Chris Williamson

Okay. I-

Dr Jack Lewis

Too short an answer? (laughs)

Chris Williamson

No, I mean, it's just, it's just a, it's a longer book than that.

Dr Jack Lewis

(laughs)

Chris Williamson

It's, it's, there's loads of words, loads of pages in this.

Dr Jack Lewis

No, it's, um, it's, you know what? I'm usually very wordy, so I've, I've, my New Year's resolution is to be more concise. That was perhaps too concise. No, so h- the thing is humans are driven by instincts, um, amongst other things, and those instincts, if you take the ones that are covered by the seven deadly sins, the important thing to remember is if you were to abolish any of those seven things, it, it would be curtains for humanity. We need a modicum of all of the seven deadly sins, um, in, in order to function properly as individuals, as communities. It's just when th- any of those seven categories of behavior go to excess that they are, uh, at its core, antisocial. Now, I'm, I'm not a religious person. Um, I spent a lot of time sort of singing hymns at school because both my primary and secondary school were Church of England, but I, I didn't really believe a word of it. I just thought, you know, I, I was always more inclined to sort of the scientific approach. Let's look at the evidence. If there's evidence to support it, you know, more evidence to support it than to refute a hypothesis, then you, you, you know, you believe accordingly. But with, I don't know, there was so much stuff in the Bible that was sort of clearly outdated that I thought, "How can people still buy into this?" Like, I realize it gives people a lot of, um, hope and it gives them a sense of community, but, but the, the concept of believing like a literal interpretation of the Bible in a post-enlightenment time, it just seemed bonkers.

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