Cards

Page 6 of 8.

Two panels — a hand on a lever diverting a trolley, and a figure pushing a man from a bridge

EthicsJul 20, 2026

A Trolley Is About To Kill Five People. You Have Two Choices.

ethics philosophy morality

Six domains each with the same threshold curve — flat for a long time, then a sudden vertical break

Systems ThinkingJul 19, 2026

One Law, Six Disguises: Things Resist Change Until A Threshold — Then Flip All At Once

systems-thinking thresholds compounding

A tap with a droplet containing the Singapore skyline, beside a map of the Malaysia–Singapore strait

GeopoliticsJul 18, 2026

Why Singapore Buys Its Water From A Country It Can't Fully Trust

geopolitics singapore resilience

A wolf on a dark hillside above a river that winds down the length of the card

EcologyJul 17, 2026

Yellowstone's Wolves Changed The Shape Of Its Rivers

ecology systems leverage

A Caravaggio-style figure lit from one side in deep shadow, beside a black-to-pale gradient panel

CreativityJul 16, 2026

How Do You Make A Room Brighter Without Adding Any Light?

creativity art contrast

An engraving-style scene of crowds dancing in a Strasbourg street while others lie collapsed

HistoryJul 15, 2026

In 1518, A Woman Started Dancing In The Street

history mass-hysteria psychology

A Pet Rock in its air-holed cardboard carrier beside its 32-page training manual and a nest of straw

MarketingJul 14, 2026

In 1975, One Company Convinced The World To Spend Money On Empty Ground

marketing storytelling branding

A street-corner crowd all craning upward at an empty grey sky

SociologyJul 13, 2026

People Will Look Up At Nothing

sociology social-proof psychology

A figure in an armchair looking out at the curve of Earth, with orbital speeds labelled around them

PhysicsJul 12, 2026

You're Sitting Still Right Now. Except You're Not.

physics motion relativity

Cheraman Juma Masjid built in Kerala temple style, with St Thomas Church and the Paradesi Synagogue below

HistoryJul 11, 2026

In One Small Town In Kerala, Faiths Arrived By Sea, Not By Sword

history kerala religion

MedicineJul 10, 2026

A Sugar Pill Can Reduce Real Pain

medicine placebo neuroscience

A watercolour Venice with a gondolier, beneath a floating dreamlike city in a circle

LiteratureJul 9, 2026

Italo Calvino And The Art Of The Impossible City

literature calvino perspective

An elephant standing over concentric ground ripples, with herds, a mirror test and two touching trunks

ZoologyJul 8, 2026

An Elephant Can Hear Another Elephant "Speak" From Miles Away — Through Its Feet

zoology animals communication

NutritionJul 7, 2026

Thirsty Or Hungry? Your Brain Mixes Them Up

nutrition neuroscience habits

Title card on dark navy with a teal category rule, on painkillers versus vitamins as a product test

Product ManagementJul 6, 2026

Build A "Painkiller," Not A "Vitamin"

product-management product value

A sugar cube with a crowd of tiny glowing human figures visible inside it

PhysicsJul 5, 2026

The Entire Species Would Fit Inside A Single Sugar Cube

physics atoms scale

Title card on dark navy with a gold category rule, on inversion as a thinking tool

Mental ModelsJul 4, 2026

Run The Problem Backwards

mental-models problem-solving inversion

Achilles in gold light before Troy on one side, Odysseus in blue before his ship on the other

LiteratureJul 3, 2026

Achilles And Odysseus: The Two Blueprints Every Hero Since Is Built From

literature myth homer

Two sea otters floating on their backs holding paws, with a detail of the armpit pocket holding a rock

ZoologyJul 2, 2026

Sea Otters Hold Hands While They Sleep

zoology animals nature

A silhouetted Sun Tzu above a valley at sunset, beside the Chinese title of The Art of War

The Art of WarJul 1, 2026

The Most Famous War Book Ever Written Teaches You How Not To Fight

strategy sun-tzu conflict

Six domains listed in teal on black, under the hidden rule that the system which wins is the one that fails safely

SystemsJun 30, 2026

One Thread, Many Worlds

systems resilience mental-models

A gold line-drawn brain with a looping arrow, on a black card framed in thin gold

PsychologyJun 29, 2026

The Zeigarnik Effect

psychology memory productivity

Africa shown at true size with the USA, China, India, Japan and most of Europe fitted inside it

GeographyJun 28, 2026

The Map On Your Wall Has Been Lying To You Your Whole Life

geography maps perception

A glass of water beside a cut diamond, with a desert and an oasis below them

EconomicsJun 27, 2026

Why A Diamond Costs A Fortune And Water Is Free

economics value mental-models