The desire for vengeance – to harm those who’ve harmed you - is part of human nature. Whether it’s getting your own back on a cheating partner or settling a score with a childhood bully, many of us have considered retribution against the person who’s done us wrong. Yet often we decide not to act on that instinct.

So what motivates someone to take revenge and why did this kind of aggressive behaviour evolve? Mike Williams talks to a perpetrator who found it sweet and hears the tragic story of a victim of impossibly cruel revenge.

Contributors:

Presenter: Mike Williams

(Photo: White Voodoo doll with red pins on cork background. Credit: Shutterstock/Scott Rothstein)