This is all very interesting, thanks for sharing. While I am not familiar at all with such degree of wealth, the first thing I noticed while looking at this list is the absence of personalities from other regions of the globe, such as the MENA and Asia. I appreciate the histories and relevance of the people listed here, but I am reminded, at the same time, that the wealth of other key people is not fully understood and ascertained, due to a lack transparency – MBS and Putin come to my mind, among others. In a way this is the documented wealth, which is anyway key to understand the world we live in.