If you have been on any kind of social media platform during the last couple of weeks, you must have seen the new “Passport Index” that ranks each and every passport in the world according to their power – or according to how many visa-free travel opportunities they provide to their holder. But my own travel experience (and obsession with proper measurement techniques) make me wonder whether “visa-free travel opportunity” is a suitable way to assess the power of a passport. Is there a better way to capture the power of a passport? (Hint: The answer is yes. This is why I am writing this blog post.)