The modern theory in which most of the people believe is the modern concept of "Neo-Darwinism".
....in which most of the people believe what? .... or it this what you mean?The modern theory of evolution that most of the people now believe is the modern concept of "Neo-Darwinism".
Most of the people who claim to know, know not more than that it was Darwin who referred the early stages of the development of man as the monkey kind
... the latter part sounds confusing. Better re-phrase!
One must not blame Darwin for
evenalthough if he ismay be proved wrong in the later years
... do you mean , "thoughtful people"?