LH, It wpuld be well to remember that Cuba's "miracle" was build with Russian Rubles. When that fountain of aid dired up, things got pretty rough and have remained so.
I won't address the "embargo" which seems to apply only to the US. It is maintained at the insistance of the elits of the exile communtiy who want Castro overthrown so they can assume their old positions of power.
Without the Soviet asistance that Castro enjoyed for so long, he would have been just another banana republic dictator.

troll