Measuring fairness in the World on how hard or difficult it is to create value in the various areas of the world.
Fairness means that we are creating value and that we are distributing this created value considering how easy it was for us to create this value, while others have a hard time creating the same value e.g. due to the environment they are currently live in or have grown up in (those who can't access the knowledge or tools to generate value as easy as we can)
(by value is meant basic goods up to luxury; a very high living standard)
That would be a specific, measurable way to determine how fair the world is today. We could use this indicator to measure progress or regress of World fairness.