Until now, am still wondering why serial killings or attacks by serial killers are ....?

peculiar to 'advanced' countries '......or let's just say there's little or no such in third world countries. I mean, sure people still get attacked in third world countries like mine.. but not in such methodical ways ala the fictional Hannibal Lecter... or the very real BTK (he was very methodical), Dahmer, Bundy or that one in Palo Alto (Ramirez) who killed my aunt years ago. I think there are such cases in some European countries, too. Do you think that social pressures in an advanced society has something to do with it? Any thoughts on this one?