Like most families, the one I grew up in is dysfunctional. Take the relationship I have with my brother: our shared history is one of lies, deceit and broken promises. Time and time again, we have exploited each other’s weaknesses in the way only siblings know how. Even the brief periods of uneasy peace have ended with terrible acts of betrayal, often committed against our own father. And yet, this Christmas, we will once again sit down to play Risk.