If Loud Aliens Explain Human Earliness, Quiet Aliens Are Also Rare
If you look at the realistic reach of the signals of human civilization, it&#x27;s a few tens of lightyears at best.<p>And once you factor in how inhumane it&#x27;d be to send children out to colonize foreign solar systems ... are we really sure we&#x27;ll do that? That&#x27;s 10 generations that live their entire lives in small metal boxes ... without the vast majority of everything we have on earth. Not so much as a single field of grass (or field of anything, building a big room in space will be a great challenge, especially since weightlessness means you don&#x27;t really need room).<p>10 generations that will have absolutely zero power to do anything about their situation. It will take 100+ generations before anything remotely resembling earth level comfort will happen (assuming the planets encountered can at any point support human life. If they need to be terraformed, we&#x27;re easily talking 1000+ generations)