H.P.Blavatsky wrote the following as for Theosophists’ duty:
Being a nucleus of a true Brotherhood, it depends upon them to make of their Society an ark destined, in a future not too distant, to transport the humanity of a new cycle beyond the vast muddy waters of the deluge of hopeless materialism.
All this must take place naturally and voluntarily, on both sides; however, the time has not yet come for the lion and the lamb to lie down together. The great reform must come about without social upheaval, without spilling a drop of blood; solely in the name of that axiomatic truth of Oriental philosophy which shows us that the great disparity of fortunes, of social rank and intellect, is due but to the effects of the personal Karma of every human being. We harvest but what we have sown. If the physical personality of man differs from every other man, the immaterial being in him or the immortal individuality emanates from the same divine essence as that of his neighbour. He who is thoroughly impressed by the philosophic truth that every Ego begins and ends by being the indivisible ALL, cannot love his neighbour less than himself.
"The Tree of Universal Brotherhood",
published at http://www.theosophyonline.com/ler.php?id=200