Such a fact that even the evolutionists can't agree how it occurs.
"Dr. Eldredge, along with Stephen Jay Gould of Harvard, formulated a theory challenging Darwin's premise that evolution occurs gradually. Their theory, known as Punctuated Equilibria, asserts that evolution occurs in dramatic spurts interspersed with long periods of stasis."
Ed McQuarrie talks the REAL History of Stocks and Bond performance.
https://www.morningstar.com/funds/what-doubters-get-wrong-about-6040-portfolio
What the 60 percent stock portfolio and the 40 percent bond portfolio helps your portfolio