Robinson Crusoe and the Birth of Economic Thinking
Before banks, stock markets or governments, economics begins with one person, limited resources and unlimited needs.
Robinson llega a la isla
Robinson lleva dos días sin beber agua. El mar lo deja en una playa desierta, sin dinero, sin tiendas, sin gobierno. Y aun así, el primer problema económico de la historia ya está ahí, esperándole en la arena.
The story begins
Imagine you wake up alone on a deserted island.
You have no money.
No supermarket.
No employer. No bank. No government.
But economic problems already exist.
Interactive decision
You have 10 hours of daylight.
Allocate your time. To add an hour, you may need to remove one elsewhere.
Concept discovered · +10 XP
Scarcity
Scarcity exists because resources are limited while human wants are greater than the resources available to satisfy them.
Opportunity cost
What should Robinson do?
Concept discovered · +10 XP
Opportunity Cost
The opportunity cost of a decision is the value of the best alternative you give up.
Productivity
Tools change what an hour can produce.
Concept discovered · +10 XP
Capital
In economics, capital means productive assets used to produce other goods and services—not simply money.
Saving & investment
Eat eight fish today—or preserve two?
Consuming less today can free resources for future production. Saving makes investment possible; time preference explains how much we value now relative to later.
Specialization & trade
Friday arrives.
Robinson
Fish per hour 6
Coconuts per hour 3
Friday
Fish per hour 3
Coconuts per hour 8
Robinson is relatively better at fishing. Friday is relatively better at gathering coconuts. By specializing, they can produce more together.
Voluntary exchange can allow both sides to benefit.
Coming later. Master specialization and trade first.
Visual summary
Economics begins with choices.
Knowledge check
Test your understanding
QUESTION 1 OF 5
If Robinson builds shelter instead of fishing, the fish he could have caught represent:
QUESTION 2 OF 5
A fishing spear allows Robinson to catch more fish per hour. It primarily increases:
QUESTION 3 OF 5
Which best describes scarcity?
QUESTION 4 OF 5
Robinson and Friday specialize and exchange goods. This demonstrates:
QUESTION 5 OF 5