Since the middle of the 18th century the practice of extradition has gradually developed until today there are some 350 extradition conventions, practically all bilateral in nature, and extradition laws in twelve or more states. These conventions and laws regulate the various phases of extradition procedure, and, in most instances, contain an article concerning political offenses. This circumstance, combined with the fact that political offenders are numerous, makes the problem of political offenders in extradition one of current importance.