Bryce Seligman DeWitt (January 8, 1923—September 23, 2004) was a theoretical physicist best known for formulating canonical quantum gravity, one of the first approaches to quantizing general relativity; for formulating the Wheeler-deWitt equation for the wavefunction of the universe with John Archibald Wheeler; and for advancing the formulation of the Hugh Everett's many-worlds interpretation of quantum mechanics. He received his bachelor's, master's and doctoral degrees from Harvard University. Afterwards he worked at the Institute for Advanced Study, the University of North Carolina at Chapel Hill and the University of Texas at Austin. He is a Dirac medallist, winner of the Einstein award of the American Physical Society, and was a member of the National Academy of Sciences and American Academy of Arts and Letters.

He was born Carl Bryce Seligman but changed his name in the 1950s. He died September 23, 2004 from pancreatic cancer at the age of 81.

There are a few places where the biography of BRYCE DEWITT can be found.

Wikipedia electronic Encyclopedia(http://en.wikipedia.org/) , an article BRYCE DEWITT.

There is an obituary note of the TEXAS University, Austin where additional information can be found.

Professor BRYCE DEWITT was a close pupil of the Nobel Prise laureate Julian Schwinger.

He was author of numerous books, most recently:
BRYCE DEWITT,
The Global Approach to Quantum Field Theory Theory, Oxford Uni. Press, Oxford, New York, 2003,

He had very deep intellectual power what can be seen in his defence of the Many-worlds interpretation of the quantum mechanics. This ability of him gives his clever BOOK REVIEW of the book: David DEUTSCH, FABRIC OF REALITY.

PHYSICS TODAY published his very interesting memoirs: "GOD'S RAYS", Physics Today, Jan. 2005, pp.32-34.
In this article he mentioned some his religious experiences and views. In the same Journal, Physics Today June and August 2005, a few Responses on this article appeared with positive and negative estimations.