I think the great filter is that any species intelligent enough to figure out the science and technology of interstellar travel has to not destroy itself first. Any species not part of a hive will ...

The Great Filter theory suggests that advanced civilizations may never survive long enough to spread through the stars — raising the question of humanity’s fate.

My feeling is that any species sufficiently advanced to attain interstellar travel would rub us out like a pesky rodent infestation, if they even recognized us as equals at all. Click to expand ...