There’s a feud brewing in this Fargo featurette

Introducing Endless Mode: A New Games & Anime Site from Paste
FX is now home to a series of feuds, but bitter rivalries can also be found outside of Ryan Murphy’s show. There’s a Cain and Abel-like struggle at the center of Fargo season three, which stars Ewan McGregor as both Ray and Emmit Stussy, two Minnesota bros who aren’t very chummy. As we’ve seen in previous previews, Emmit envies Ray’s good fortune (and full head of curly hair, we presume), and he plans to do something about it—namely, knock over his brother’s business. But in this new featurette, we get a better idea of just what started their feud: some very old stamps.