After World War I, Southern Slavs finally united in a new country, an idea that originally emerged during the 17th-century. The Kingdom of Serbs, Croats, and Slovenes were founded in 1918, but was renamed Yugoslavia in 1929. It lasted until 1991 when it split into six new republics: Serbia, Montenegro, North Macedonia, Bosnia & Herzegovina, Croatia, and Slovenia. Even today, there are many people in these six countries that would love to have the old Yugoslavia back. There’s even a term for this psychological and cultural phenomenon, Yugo-nostalgia. The largest institution that…