There was a vital need for a doctrine of vigorous activism, having as its basis utter selflessness, calm detachment and total absence of personal passion and desire. The Bhagavad Gita has supplied the nucleus for such a doctrine. The passage of the centuries and the advent of numerous god men and compassionate saints and reformers did the rest.
As the ignorant men act from attachment to action, O Arjuna, so should the wise act without attachment, wishing the welfare of the world. (3:25)