I don't really know what you do with early life
articles. I'm still
working out how you define early life.
Case-by-case, I should think. There is one
on John Milton, going up to
1640 or so, which makes a lot of sense. Some lives are heavily segmented
(e.g. Winston Churchill). If we say that the use of periods should
conform to some natural "bookends", I don't think we'll go too far
wrong. I have quite a few biographies that follow such a pattern.