Analysis of information sources in references of the Wikipedia article "Many-worlds interpretation" in English language version.
On locality:"Amongst those who have taken Everett's approach to quantum theory at all seriously as an option, it is a commonplace that—given an Everettian interpretation—quantum theory is (dynamically) local-there is no action-at-a-distance" on determinism:"But zooming-out (in a God's-eye view) from a particular branch will be seen all the other branches, each with a different result of measurement being recorded and observed, all coexisting equally; and all underpinned by (supervenient on) the deterministically, unitarily, evolving universal wavefunction"
DeWitt eventually softened his view on the necessity of a splitting universe occurring with every atomic interaction when he broadly embraced the decoherence approaches proposed by Dieter Zeh, Wojciech Zurek, James B. Hartle, Murray Gell-Mann, and others beginning around 1970.
On locality:"Amongst those who have taken Everett's approach to quantum theory at all seriously as an option, it is a commonplace that—given an Everettian interpretation—quantum theory is (dynamically) local-there is no action-at-a-distance" on determinism:"But zooming-out (in a God's-eye view) from a particular branch will be seen all the other branches, each with a different result of measurement being recorded and observed, all coexisting equally; and all underpinned by (supervenient on) the deterministically, unitarily, evolving universal wavefunction"
DeWitt eventually softened his view on the necessity of a splitting universe occurring with every atomic interaction when he broadly embraced the decoherence approaches proposed by Dieter Zeh, Wojciech Zurek, James B. Hartle, Murray Gell-Mann, and others beginning around 1970.
The conclusion seems to be that no generally accepted derivation of the Born rule has been given to date, but this does not imply that such a derivation is impossible in principle.
On locality:"Amongst those who have taken Everett's approach to quantum theory at all seriously as an option, it is a commonplace that—given an Everettian interpretation—quantum theory is (dynamically) local-there is no action-at-a-distance" on determinism:"But zooming-out (in a God's-eye view) from a particular branch will be seen all the other branches, each with a different result of measurement being recorded and observed, all coexisting equally; and all underpinned by (supervenient on) the deterministically, unitarily, evolving universal wavefunction"