Why Anderson Silva is the best p4p fighter in the world

The words “pound for pound” can be interpreted anyway you would like. But as MMA fans I believe we all have the general idea. Whether you believe it has more to do with weight or with skill. you know how powerful the term is. To call someone the best pound for pound fighter in the world means you believe they are the best fighter that is walking on this earth.
I believe that man is Anderson Silva. Although there are many fighters that are in the conversation I don’t see anyone who has