The Ramakrishna mission principle

Śrīla Prabhupāda’s letter to Kīrtanānanda, February 11, 1967:

I wish that each and every Branch shall keep their independent identity and cooperate keeping the Ācārya in the centre. On this principle we can open any number of Branches all over the world. The Ramakrishna mission works on this principle and thus as organization they have done wonderfully.

The Ramakrishna mission achieves “this principle” that Śrīla Prabhupāda wants to be followed in ISKCON through a ṛtvik system.