If the Slavic nations didn't fight each other and fight for other people groups. I don't think they would've united into ONE state, but they would've made greater states than they did.
Also if you want to argue with me that Czechs and Slovenians aren't Slavs, then shut the fuck up, because they are. Also do you really want to turn down extra territory ? It means more money, better prdduction, more spaces for factories (or matter of fact, already existing factories)...etc.
X