Fear of the unknown.
They are afraid of new ideas.
They are loaded with prejudices*,
not based upon anything in reality, but based on:
If something is new,
I reject it immediately because it’s frightening to me.
What they do instead is just stay with the familiar.
You know, to me,
the most beautiful things in all the universe, are the most mysterious.
( *Prejudices se pronuncia Préyudecis )