WolfgangFeist , German Spoiler!
The conclusion of Weinersmiths "A City on Mars":
"…someday, with enough knowledge, we can have Mars. … But we have to earn it, both by gaining in knowledge and by becoming a more responsible, more peaceful species. Going to the stars will not make us wise. We have to become wise if we want to go to the stars.”Yepp. This also might be the solution for the so called "Fermi-paradox".
https://passipedia.de/grundlagen/energiewirtschaft_und_oekologie/bemerkungen_zum_fermi-paradox