This week's episode is brought to you by Casper. Casper is a sleep brand that makes

expertly designed products to help you get your best rest one night at a time.

You spend one-third of your life sleeping, so you should be comfortable. The experts at

Casper work tirelessly to make a quality sleep surface that cradles your natural geometry

in all the right places. The original Casper mattress combines multiple supportive memory

foams for a quality sleep surface with the right amounts of both sink and bounce. Casper

also now offers four other mattresses, the wave, the essential, the hybrid Casper and

the hybrid wave, all at affordable prices because Casper cuts out the middlemen and

sells directly to you. There's free shipping and returns in the United States and Canada,

and you can be sure of your purchase with Casper's 100 night risk-free sleep on it trial.

The Duncan family still heartily endorses the Casper mattress and pillows, many great

naps and great night sleeps were taken on the Casper. They were just comfortable mattresses

that helped us all sleep better. So the deal is you get $50 towards a select mattress

by visiting Casper.com slash revolutions and using revolutions at checkout. That again,

get $50 towards select mattresses by visiting Casper.com slash revolutions and using revolutions

at checkout. Terms and conditions apply.

Hello, and welcome to revolutions.

Episode 10.12, The Descent Rists.

So we get to start this week by doing a little roundup of errors. It's never easy to quickly race

through a thousand years of history and I have stumbled in a few places over the last few episodes.

Like last week, for example, as many of you pointed out, I said that Moscow was the capital of

Russia, which of course it was not the capital of Russia. We know that the capital of Russia was

...