You voted, we listened! Our listener poll of "which of our series' do you want unlocked" returned a result! So... welcome back to the world of intelligence.

Riley, Alice, Milo, and Chapo Trap House's Felix Biederman have once again sat down and cracked open a book of brain literature. This time we read through British brain god Dr. Matt Ridley's The Rational Optimist (2010), and it left us all a lot happier as we explored a truly beautiful mind. It's a balm for the soul. Check it out!