Deletion of List of largest ruling leaders by population

Comment: This is a clear example of . In practice, it is a (woefully incomplete) list of countries by peak population with an additional column for the head of government (which is not necessarily the "correct" choice of leader, as {{u|LaundryPizza03}} noted above). One suspects that e.g. Kublai Khan would qualify for inclusion, but historical population figures are of course notoriously difficult to estimate and the margins of error are huge. Estimates from different authors often vary significantly (see e.g. http://repository.upenn.edu/cgi/viewcontent.cgi?article=1009&context=psc_penn_papers here). The practical upshot of this is that collecting estimates from different sources and using them to create a ranked list inevitably results in a  mess; the only way to construct an article like this properly is to use a high-quality source which has collated the information in a systematic way (i.e. something along the lines of what ''https://books.google.com/books?id=9mkLEAAAQBAJ&pg=PA102 The Oxford World History of Empire'' does for ranking empires by population as a percentage of the world population). Absent such a source, this is fundamentally a non-starter
Stance: delete
Cited policy: Wikipedia:No original research (WP:OR||WP:SYNTH)