Logic behind Mixed Martial Arts rankings

Rankings. They’re addictive and endlessly debatable, or are they? One of the great features of Low Kick is the option to submit your rankings for the respective weight classes and of course, the revered and glorified “pound for pound” list. 
The question I have been asking myself for weeks now is what gives a fighter the right to be in the top 10? Should it be based on skill alone, the physical abilities that fighter appears to exhibit against his opponents? if so then the likes of Alistair Overeem,

George Sotiropoulos: I’m moving in the right direction (Exclusive Interview)

UFC Welterweight contender George Sotiropoulos made another bold statement last month, after defeating Joe Lauzon via a Kimura at UFC 123. Currently enjoying an impressive 7-0 streak in the UFC, 33 year old Greek-Australian will look to a secure a title shot, facing Dennis Siver at UFC 127 in February.Sotiropoulos’s only defeats are against Shinya Aoki in 2006 via a Disqualification, and against Kyle Noke back in 2005 via a Split Decision. His MMA record currently stands at 14 victories and 2 losses.