and bridgit came to realize it wasn't a zero-sum game. come up, you have to come up, too. she said as long as we're divide, we're conquered. and that movement, the cross-racial fight for 15 has been unlocking what i began to call the solidarity dividends, these gains we can achieve, but only when we link arms together across race-- higher wages, cleaner air, better funded schools-- for everyone. >> trevor: in america, one of the things that intrigued me the most because it was similar to south africa was the story of the public swimming pools. you see, i even have stand-up bits about this where i would say racism is such a powerful drug, that it would make white people drain swimming pools, the thing that they loved more than anything, they decimated them. you've used this as the center, you know, like the through-line to the book and the telling of the story. why are public pools the perfect example of how racism hurts the people who oftentimes are the most racist. >> i went to montgomery, alabama, where there is this park in the middle