Part 1 Probing without progress (1950-1965): leaning to one side (1950-1957) the cost of militancy (1958-1965). Part 2 From paralysis to pragmatism (1966-1977): socialist fortress (1966-1968) prelude to pragmatism (1969-1971) thwarting superpower hegemony (1972-1977). Part 3 Anti-hegemonism to modernization (1978-1989): leaning to the other side (1978-1989) developing influence and influencing development (1982-1989).
No takes yet. Share an insight, caveat, or question.
Steven I. Levine (1991) studied this question.