Maybe so, but a necessary feature of all of them is lack of sufficient understanding to fully commercialize the tech or publish peer reviewed scientific articles about the newly discovered principles.

Undisciplined

I actually think there's a few "tech trees" going on, including things like:

aliens_and_UFOs

FBI agents investigating UFOs worried they could be pushed out in possible purge

OneOneSeven

I actually think there's a few "tech trees" going on, including things like:

- humans who've discovered this science on their own; 1890s airships, Stan Deyo

- Govt entities that have been trying to understand it since they got ahold of crashed/downed/found crafts; Bob Lazar, 

- Private companies that made breakthroughs on their own after being given ET crafts to work on, Northrop Grumman, Lockheed, Raytheon  


