What if one book could contain the sum of mankind’s knowledge? Scholars and chroniclers have tried to write this book since antiquity, penning several so-called universal histories (perhaps the best was Rashid al-Din’s “Compendium of the Chronicles” that was commissioned by a Mongol Empire daughter state in 14th century). This goal was reached in 1768 with the first edition of the Encyclopedia Britannica was published in Scotland by Enlightenment thinkers who believed that human thinking could be categorized. It became a fixture of American households in the 19th century and occupied the bookshelves of every library and school in the United States until very recently.

Today’s guest is Jill Lepore's show, host of the show “The Last Archive,” about the US's post-truth crisis -- of how we know what we know and why it seems lately as if we can't agree on anything at all. She both reckons with the present moment through her historical expertise and also presents solutions that are forward and current.