> We’re either alone, or we’re effectively alone ie everyone else is forever undetectable. Native tribes could be forgiven for assuming they were alone until e

> We’re either alone, or we’re effectively alone ie everyone else is forever undetectable. Native tribes could be forgiven for assuming they were alone until explorers and conquistadors arrived. It’s possible that a civilization millions (or billions) of years ahead of us in biology, energy, philosophy, etc. is just beyond our comprehension at this moment to even know what to look for, where or how. Plus, we already try to make things hard to find like stealth fighters. Perhaps it’s a good idea for survival in the universe to be difficult to find.