Originally Posted by @Sweet Cleopatra
I read that Croatian spring was due to unfairness towards Croats and that they were supported by left progressives against the majority of communists, then Tito allowed the 74 constitution which was more progressive.
I don't know what Croats were yapping about, but they always thought Yugoslavia was "keeping them down." They were the primary drivers of Yugoslav disintegration before WWII and after WWII.
A proper reflection of history indicates quite the opposite, i.e. that Yugoslavia helped the Croats gain territory and political sovereignty.