Later in his life Everett would write in this (unedited) Ph.D. dissertation:When he was 12, Hugh wrote letters to Albert Einstein raising the question whether it was something random or unifying that held the universe together. Einstein was kind enough to answer. In a letter dated June 11, 1943, he wrote,
"Dear Hugh: There is no such thing like an irresistible force and immovable body. But there seems to be a very stubborn boy who has forced his way victoriously through strange difficulties created by himself for this purpose.
Sincerely yours, A. Einstein".
"[W]e must renounce all hope of finding anything like the correct theory... simply because the totality of experience is never accessible to us."This follows from his theory of multiple universes, also known as decoherence theory, since we are on one realized path among many branching superpositions each producing yet another universe (with a different 'copy' of ourselves). [see Sci.Am. 2007 December, pp.98-105 for more details]
