'River Out of Eden' by Richard Dawkins
Dalio told Ferriss that he thinks "evolution is the greatest force in the universe. I think the purpose of everything is to evolve. I think individuals are just vessels for our DNA evolving."
He recommended "River Out of Eden," from 1995, by the prominent English biologist and New Atheist thinker Richard Dawkins.
"Phew. It just really puts things in perspective," Dalio said.
'The Lessons of History' by Will and Ariel Durant
The husband-and-wife team of Will and Ariel Durant wrote 11 volumes on Western history from 1935-1975, ending with Napoleonic era only because they died weeks apart from the other. They won a Pulitzer Prize for the tenth volume of that series.
Dalio recommended their brief 1968 book "The Lessons of History," which is an overview of recurring themes they found through analyzing thousands of years of history