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Indeed, GWR only knows of 10 confirmed or reliable cases in history of humans reaching 8 ft or more. Sultan first became the world's tallest living man in 2009, when he measured 246.5 cm (8 ft 1 in) in height. He took the title from Xi Shun (China, b. 1951), who measured 2.361 m (7 ft 8.95 in) in height when measured in 2005.
In Malaysia and Thailand, younger generations have experienced increased height. Today the tallest race of humans is the Nilotic peoples of Sudan such as the Dinka they have been described as the tallest in the world, with the males in some communities having average heights of 1.9 m (6 ft 3 in) and females at 1.8 m (5 ft 11 in). The tallest person in recorded history was Robert Pershing Wadlow born in Alton, Illinois USA.