<Table> <Tr> <Td> </Td> <Td> Some of this article's listed sources may not be reliable . Please help this article by looking for better, more reliable sources . Unreliable citations may be challenged or deleted . (November 2017) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> Some of this article's listed sources may not be reliable . Please help this article by looking for better, more reliable sources . Unreliable citations may be challenged or deleted . (November 2017) (Learn how and when to remove this template message) </Td> </Tr> <P> The list of the wealthiest historical figures gathers published estimates as to the (inflation - adjusted) net - worth and fortunes of the wealthiest historical figures in comparison . Due to problems arising from different definitions of wealth, ways of measuring it, various economic models throughout history, as well as multiple other reasons--this article discusses the wealthiest people in the following separate historical periods: Antiquity, Middle Ages and modern period . Accordingly--because of the previously mentioned difficulties--it is not possible to determine the single richest person in all of history . </P> <P> For the modern period, wealth can be measured more or less objectively via inflation adjustment, e.g. comparing the nominal GDP of the United States of the respective periods, and then converting it into contemporary United States dollars . For the medieval and ancient history, comparison of wealth becomes more problematic, on one hand due to the inaccuracy or unreliability of records, on the other due to the difficulty of comparing a pre-industrial economy to a modern one, and especially in the presence of absolute monarchy, where an entire kingdom or empire is considered the ruler's personal property . The latter factor is also an issue in the early modern to modern period, e.g. Davidson (2015) lists Joseph Stalin among The 10 Richest People of All Time for his "complete control of a nation with 9.6% of global GDP". </P>

Richest man of all times in the world
find me the text answering this question