⬆️ @Michigander

>> Democracy Rule of 80

This is similar to saying #PeaceConstant is 3 generations, somewhat like #MarchettiConstant.

#Peace can last for maximum 3 generations.

With longer human life expectancy and widening generational gap, we now take a generation to be ~30 years.

So world peace can last a maximum of ~90 years, very close to the #US #DemocracyRule of 80 years

⬆️ @GreenFire @Huntn00 @RememberUsAlways @palin

#PeaceConstant is 3 generations, somewhat like #MarchettiConstant.

In previous millinea, human life expectancy was shorter. So generational gap was also shorter. Now we take a generation to be ~30 years.

https://en.wikipedia.org/wiki/Marchetti%27s_constant

Marchetti's constant - Wikipedia

How #transportation technology shapes cities, by Tomás Pueyo.

https://open.substack.com/pub/unchartedterritories/p/transportation-technology-shapes-cities

The size of #cities is determined by transportation technologies, whether it’s Ancient Rome, Medieval Paris, Industrial London, turn-of-the-century Chicago, or Highway Atlanta.

People live within 30 min of their work. This is the #MarchettiConstant

Transportation technologies are the primary shaper of cities, and with that, our wealth and health.

Very informative read!

How Transportation Technologies Shape Cities

We don’t realize it, but the shape of our cities—from how big they are to what services they have—is mainly driven by one thing: transport technologies.

Uncharted Territories