“This planet has - or rather had - a problem, which was this: most of
the people living on it were unhappy for pretty much of the time.
Many solutions were suggested for this problem, but most of these were
largely concerned with the movement of small green pieces of paper,
which was odd because on the whole it wasn't the small green pieces of paper
that were unhappy.”
― Douglas Adams, The Hitchhiker's Guide to the Galaxy