Given the huge distances in space between galaxies we’re not looking at imminent extinction even if we’d have found extraterrestrial life. The distances are measured in light years, remember?

I’d say life+time, not intelligence+technology equates to that. Do mind that while the military handles arsenals great enough to destroy the planet countless times over, people’s average life expectancies have increased with time. Quality of life, too.

Now if only we would collectively make an effort to put all that progress to sustaining life instead of capitalising on its’ protection or repurposing resources, we’d have Star Trek, not lifeless valleys.

We’ve already got a spaceship capable of sustaining life for so long as the sun doesn’t burn too hot and shifts the solar system’s habitable zone, it’s called planet earth.