Tomas Pueyo Profile picture
Sep 24, 2021 19 tweets 7 min read Read on X
The geography of Egypt is bonkers 🇪🇬🌍
Look at that image of the Middle-East by night. See that "flower" in the middle? That is the Nile.

Egypt has 105 MILLION ppl!
99% of them live in that light area!
That's 3% of its territory!

What else is crazy about Egypt's geography?
🧵
The Nile's banks are between 0.5km and 20km wide (~0.3 to 12 miles). 105M ppl live in that area plus the delta. Crazy. They do that because it's fertile AF

What's outside though? Nothing.
In the west, there's nothing for thousands of miles. There's so much nothing that in 5000 years of history, Egypt has NEVER been successfully invaded from here.

Even the nazis tried and failed.
Why is it so damn dry? Well, weather is not nice.
Why is it so bad? Because Egypt is in the Horse Latitude. They have deserts across the world.
Why is that bad? More details here:
unchartedterritories.tomaspueyo.com/p/a-space-craf…
Look at the south. The lights stop abruptly. Why? Does the Nile stop there? Not at all. It continues for thousands of miles. What then?

The Aswan Dam
The Aswan Dam has created a huge lake. The southern border of Egypt goes through that lake, quite close to the dam.

Isn't that weird? Why is the same point a dam, a border, and the limit of lights and population of a country that packs 105M ppl in such a small place?

Cataracts
See, the Nile flows very slowly across all of Egypt. But not before. Aswan is where the Nile's 1st cataract was. Then there are a bunch more upstream.

Really, Egypt's length was defined by the place of a cataract.

What do they look like?
Nothing crazy. They're just points where water is faster, rocks appear on the surface, and some banks of sand might accumulate.

What's the big deal then?
This is where the Nile is not navigable anymore.
So Egypt couldn't easily incorporate it into their empire.
Different kingdoms appeared over time. That area to the south was called Nubia.

Egypt & Nubia mixed over millennia, but still remained different enough that that area to the south is a different country, Sudan
The banks of the Nile there are narrower.
Between the narrower banks, the faster flow, and the fact that it's not navigable, Sudan is much poorer and has a smaller population. They can't even afford as much electricity as Egypt—which is partially why the lights stop at Aswan
What's in the north? The delta
It's beautiful.
You know what it's not? Navigable.
40% of the population and 50% of the crops come from there, but the Nile spreads so much that trade ships can't navigate.
That means that, despite being the oldest civilization on the Mediterranean, Egypt was never a naval power.

It's not just that the Nile can't be navigated. It's also that Egypt has no room for trees. No trees, no wood, no ships, no trade, no navy.

Poor and exposed.
If you were clever, where would you put your capital in such a country?

Pharaohs had thousands of years to think about it, and usually picked the point between the delta and the Nile proper.

That's Cairo today.
And funnily the Suez Canal is a stone throw's away from there.
Big deal, because the Suez Canal accounts for a huge share of Egypt's foreign currency.
How did this influence its history?
The pharaohs?
Why was Egypt invaded so many times?
Why is it poor?
Why is it friendly with Israel?
With the US?
Why the military pushed aside the Muslim Brotherhood?
It all comes down to geography.
I answer all these questions in this article (this one is paid)
unchartedterritories.tomaspueyo.com/p/egypt
Want more? Follow me or sign up to my newsletter. I will write many more threads about this. Or other similar threads. For example this one about China
unchartedterritories.tomaspueyo.com/p/what-china-w…
Or about the world and the US
unchartedterritories.tomaspueyo.com/p/world-chessb…
Or about the Caribbean
unchartedterritories.tomaspueyo.com/p/a-brief-hist…

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More from @tomaspueyo

Dec 5
Why are the top 20 US cities where they are? (including metropolitan areas): 🧵

1. New York: It became the trading hub between the Great Lakes and the Atlantic regions when it built its canals through the Appalachians

Image
2. Los Angeles:
• Trading hub between the world (Pacific) and the US (railways)
• Weather + biggest coastal valley on the Pacific➡️agriculture & cheap building
• Oil
• Landscapes + far from the East Coast centers of power➡️Attracted the film industry

Image
3. Chicago:
Trading hub between the Mississippi River Basin and the the Great Lakes area (and hence the world, via New York)

Image
Read 20 tweets
Nov 26
People think we must shrink the world's population to be happy, but they're wrong

A world with shrinking population would be decaying, poor, brutal, violent, hopeless

A world with 100 billion people would be dynamic, rich, innovative, peaceful, hopeful
🧵 Image
1. In the last 2 centuries, the world got better as the population exploded:
• Richer
• Live older
• Lower child mortality Image
Image
Image
Image
• Fewer homicides
• Fewer war deaths
• Fewer hours worked
• Lower share of poor people
And much more: fewer infections, diseases, accidents. More racial equality, sexual equality. Instant access to all the knowledge in the world. We can go anywhere, whenever we want... Image
Image
Image
Read 17 tweets
Nov 19
We can raise our population on Earth from 8 billion to 100B humans if we want to

Would we starve?
Be too crowded?
Would pollution explode?
Ecosystems collapse?

No! Don't believe alarmist degrowthers. This is why they're wrong: 🧵 Image
Degrowthers put a label to "how many humans can the Earth sustain": carrying capacity

Their estimates vary wildly
Wait, what? What a surprise, the mode of their estimates is 8B—exactly the current number of ppl on Earth

WHAT A COINCIDENCE!Image
Or they lack imagination: OMG the Earth is already on the brink. Surely not one more soul fits here!

And then they try to find out what limits we might be hitting. Their most common fears are:
1. Room
2. Food
3. Water
4. Energy
5. Pollution
6. Resources
Let's look at each:
Read 20 tweets
Nov 13
Can desalinated water deliver a future of infinite water?
Yes!
• It's cheap
• It will get even cheaper
• Limited pollution
• Some countries already live off of it

We can transform deserts into paradise. And some countries are already on that path:🧵 Image
Crazy fact:
Over half of Israel's freshwater is desalinated from the Mediterranean!
And the vast majority of its tap water is desalinated too!
And it costs less than municipal water in a city like LA! Image
It's not the only country. Saudi Arabia is the biggest desalinator in the world. 50% of its drinking water is desalinated. It's 30% in Singapore, a majority of water in the UAE...

What if we applied this, but at scale across the world? Image
Read 18 tweets
Nov 12
President-elect @realDonaldTrump could own the environmentalists by solving global warming on his first day in office, and do it for 0.1% of current climate investments

Here's how: sulfate injection 🧵 Image
1. GLOBAL WARMING
2024 is the 1st year we pass 1.5ºC above pre-industrial levels
This is caused by CO2
Some side-effects of this CO2 are good, but it's undeniable that the planet is warming fast, and it could create some nasty pbms Image
1. GLOBAL WARMING
2024 is the 1st year we pass 1.5ºC above pre-industrial levels
This is caused by CO2
Some side-effects of this CO2 are good, but it's undeniable that the planet is warming fast, and it could create some nasty pbms
Read 18 tweets
Nov 9
Should you be able to experiment on your own cancer?

This expert virologist did. It was the 3rd time her cancer appeared. It didn't bode well. So she injected viruses in her tumor and it shrunk.

But most journals didn't want to publish her results. Why? Because they're dumb 🧵
Beata Halassy got cancer in 2016, then again in 2018, and again in 2020. That looked awfully bad. She knew if she continued in the traditional route, her cancer might eventually prevail. So she decided to try what she knew about: viruses Image
Here's the theory:
1. Select a virus that is likely to attack your target cancer cells
2. Because cancer cells neutralize the immune system, they're more likely to be killed by viruses than healthy cells
Read 17 tweets

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