> we probably don't have to worry about anything further than 20 light years away.
On what basis? Are you assuming that malevolent extraterrestrials would be unwilling or unable to travel further than this? Why?
On what basis? Are you assuming that malevolent extraterrestrials would be unwilling or unable to travel further than this? Why?
The Dark Forest solution to the Fermi Paradox (the first strike advantage): https://www.youtube.com/watch?v=xAUJYP8tnRE
How to Win an Interstellar War (without leaving home) https://www.youtube.com/watch?v=tybKnGZRwcU