Hugh Everett's work has been described by many people in terms of many worlds, the idea being that every one of the various alternative histories, branching histories, is assigned some sort of reality.
As an analogy one can imagine an intelligent amoeba with a good memory. As time progresses the amoeba is constantly splitting, each time the resulting amoebas having the same memories as the parent. Our amoeba hence does not have a life line, but a life tree.Hugh Everett
The physical "reality" is assumed to be the wave function of the whole universe itself.Hugh Everett
If you want to get an interesting perspective do not think of Hugh as a traditional 20th century physicist but more of a Renaissance man with interests and skills in many different areas. He was smart and lots of things interested him and he brought the same general conceptual methodology to solve them. The subject matter was not so important as the solution ideas.Hugh Everett
Someone once noted that Hugh Everett should have been declared a "national resource," and given all the time and resources he needed to develop new theories.Hugh Everett
My father, Hugh Everett, III, author of the Many Worlds Theory, was a quiet man during the eighteen or so years I shared a house with him. Turns out he was depressed over a sad childhood and then being dismissed as a kook, only later - too late - to be recognized as a genius.Hugh Everett