No, they aren't dying, if you're talking about parties in general. However, major splits inside the main parties will happen if those parties don't allow other

No, they aren't dying, if you're talking about parties in general. However, major splits inside the main parties will happen if those parties don't allow other new parties to rise up - which is exactly what the two political parties in the US have done, in more ways than one. The only surprising thing about this is that people are surprised it's happening at all and that everyone isn't supper happy with their century old parties.