'If Alexander the Great Had Lived On', in Toynbee (ed.): Some
Problems in Greek History (Oxford University Press, 1969):early steam engines are combined with early rail tracks to allow the Greeks to form a mighty empire.Arnold Toynbee considered what might have happened if Alexander the Great had not drunk himself to death in 323 B.C. at the age of thirty-three. … The world religion he envisions under a global empire ruled by a continuous succession of Alexanders is a hellenized version of Buddhism, highly plausible given the extraordinary similarity between the teaching of the popular Greek philosopher Pythagoras and those of the Buddha.
これじゃないかな 出典が
http://alternatehistory.net/discussion/showthread.php?t=60801
で、サイトが、もしかしたら、これもあった歴史かも というサイトなので、本当の出典にあたる必要がありますが、トインビーが書いているから、それもありだね、なんて感じで、トインビーの文章を引用しているので、これかも。