Considering that everything fell apart so quickly after his death, how did he keep it together for so long?
Much has been written and more can be written. Several previous discussions here have had statements along the lines of "You asked a question that I consider one of the hardest for this sub to answer". Unfortunately, I haven't found a single previous discussion that talks about all of Tito's setup and approach, the 1974 constitution, and the economy. Much less one that talks about pre- and post-Tito times: some people discussed them, and I found it useful in a compare and contrast way. So I'm sorry that this reply has more pointers than I would like in a FAQ Finder post.
Some information is here . Most of the pertinent replies were by /u/odjebibre , /u/Fucho , and /u/commiespaceinvader . If you have a limited amount of time or patience, you could get a general idea from this, though I liked the details from other discussions.
This : commiespaceinvader again. For this particular question, I think it's OK to skim up to "After the end of the war". (Mind you, what he wrote before that is valuable in understanding Tito; I think it just doesn't apply to this question.) roamingspirit98's reply summarizes Tito's overall approach.
This : later the same day, commiespaceinvader provided mostly details towards the end, the 1974 constitution and post-Tito moves.
This : HarryCochrane went into economic / development factors that affected the Yugoslav disintegration. For more details on how they played into the disintegration, see paragraph 'Now, a bit on "who exploited whom"' and the next by Fucho here .
(If you want to dig into the fall, which I know is past your time period, Fucho compiled links here .)
I can't find itFound it: to address "everything fell apart so quickly after his death", you could see Fucho here , though again it's past the Tito era.
This is not to discourage discussion. More questions, data, and debate are welcome.