How much intelligence does it take to sneak up on a leaf?
There is no cause so good or noble that it will not attract fuggheads; and the fuggheads will get all the press.
In the world of words the imagination is one of the forces of nature.
We should not have assumed that a political space station could be built.
Psi and/or magical powers, if real, are nearly useless.
Ethics change with technology.