An irresistable footnote: in 1971, pension fund managers invested a record 122% of net funds available in equities - at full prices they couldn't buy enough of them. In 1974, after the bottom had fallen out, they committed a then record low of 21% to stocks.
You have to decide what is extraneous and what is central. There is always more to tell. If you want to have a finished product, at some point you have to say "enough."