Although mysteries and science fiction may seem like very different kinds of writing, the two forms share some basic similarities. First of all, both are action-directed, emphasizing plot at the expense of character development. Possibly for this reason, both types literature have been scorned by critics as being merely "entertainment" rather than "literature." But this attack is unjustified, for both mysteries and science fiction share a concern with moral issues. Science fiction often raises the question of whether or not scientific advances are of benefit to humanity. And a mystery story rarely ends without the culpable person being brought to justice.