How dangerous are those aliens?


The Kardashev scale rates civilizations by their energy consumption, and the Torino scale rates asteroids for the danger they pose to our civilization. Is there a rating system for civilizations and the danger they pose to our civilization? A way to roughly calculate based on other observed phenotypic traits?

I googled for a few minutes and couldn’t find one, so we’ll invent it together now, with this document be its official description–


Scale goes from 0 to 10. The lower the number, the more dangerous

A Trait effect exampes on rating

Some kind of dangerous microbe, like the Flood in Halo (weights rating towards 4-7 territory)

Technologically or mentally superior (weights towards 0-3 region)

highly capable but not sentient (weights rating towards opposite directions based on if it falls to left or right of 5, with exponentially increasing multiplier based on where the original number lands)

has a conflict-oriented/warrior culture (weight towards 3)

Perceives time slower (weights toward 6)

is not intelligent (7)

Have ethics that prevent killing (what do you think–how would that affect their ability to do what “dominate” means–soft power?)

Multiplicative factors

These factors apply an effect pushing the average rating towards the extremes, based on if all other numbers average to left or right of 5.


Where are we on this scale? Answer would require knowing our relative might in intergalactic warfare.

Science fiction story:

What if we are the only aggressive species for awhile (related to the idea that earth is prison planet with all the “bad” life forms)

Aka humanity turns out to be the most aggressive, type species there is, and the only one willing to go to war/colonize

Even a single human by herself could make quick work of the most advanced (peaceful!) alien civilizations.

A bug in the solar system’s democratically-committed code (that operates the state-run auto factory) resulted in runaway production of state-of-the-art “universe exploration ships”.

The runaway production occurred on a particularly metal-rich asteroid, before it was shut down. Eventually every human (and even some other smart animals) got their own.

So, all the humans puttered off into space. Explorers rarely interact with even a single other human (yes, thats how advanced the travel technology was, and the wide area of conquest, was!)

A long period of economic prosperity and peace emerged

  1. But recently, so much of the universe was already explored, that humans are starting to conflict with one another again, for the first time in a long time.

  2. But recently, there has been a growing sect of peaceful humans that vie to not conquer but rather equitably trade with them. This causes rifts between the two schools of thought, and follow-on skirmishes.

  3. But recently, there have been reports at the Emergency Galactic Help Request Line. It lay silent for several millenia, but recently there are reports of inexplicable lost contact in a particular region of space…