David Gleicher in 1960 had coined that for a successful Change
D x V x F > R
Dissatisfaction, vision and first step is needed and they together should be greater than the resistance to change. If any of the 3 essential ingredients are missing the movement fails.
One of the reasons why people are so optimistic about the current Modi Government is because the climate feels just right. The leadership has not only a clear vision, but also balls and plan to achieve the same.
In the internet I found an alternative version of the formula. However it seems that this is more apt for individual growth only.