Despite drastic punishments for drug dealing, up to and including death in many countries, the worldwide illegal drug trade continues to flourish. While governments invest vast sums of taxpayers' money in fighting a so-called "war" on drugs, one glance at the size and scope of the drug business suggests it may always be unwinnable.
http://www.businessinsider.com/how-drugs-travel-around-the-world-2015-2
http://www.businessinsider.com/how-drugs-travel-around-the-world-2015-2