She wrote an important book on the survival of Hinduism called, A Warning to the Hindus, published in 1939. Power, nationalism and, surprisingly, liberalism in social matters were at the heart of her proposition. I include a brief excerpt below.
A Warning to the Hindus
From chapter 6
‘A Change of Mentality Among the Hindus’
The Development of Nationalism
The three quarters of Spain were Mohammadan, at one time. Why are they not now?
Not because of the superiority, if any, of the Gospel over the Koran, but because of the greater military strength of the Catholic kings, makers of modern Spain, compared to that of the last Mohammadan rulers; because political power remained, finally, in the hands of the Catholics. When you possess political power, then you can make nations do what you like, think what you like, profess whatever sense or nonsense you like, nowadays and in the future, as well as you could in the past. It only requires a more powerful administration, backed by more powerful war-engines, as all techniques improve with time.
We would like the Hindus to remember this, and to strive to acquire political power at any cost. Social reforms are necessary, not because they will bring more “humanity” among the Hindus, as many think, but because they will bring unity, that is to say power. The Hindus have been living, up till now, with less “humanity.” Many unseen dramas, many crushed aspirations, many weary, wretched lives have been the consequence of Hindu orthodoxy, enforced in daily matters with all its rigidity. But we do not speak of them. We do not advocate in favour of the sufferers, in the name of “humanity.” If, with less “humanity” the Hindu nation was growing stronger as a nation, instead of growing weaker everyday; if, with less “humanity,” the Hindus could organise themselves, reconquer India for themselves, and make free India a ruling power in the world, then, we would never ask them to change the slightest of their habits, nor to get rid of the grossest of their superstitions, if any. If, without the collaboration of all Hindus, Hindudom was flourishing and able to flourish in the future, we would not even advocate the suppression of Untouchability. There is nothing so strong as deep-rooted customs. Humanitarian views have never uprooted them. But the pressure of a hard, undeniable necessity has, sometimes. The necessity that is pressing the Hindus, specially in the regions where they are a minority, is to live, first. To live, they must grow strong; they must get political power in their hands. We advocate social reforms, the abolition of Untouchability, liberalism in daily social matters, alliance with the sturdy Hillmen considered as Hindus (since necessary), and the recall of all Indians back to Hindudom, because we believe that these are the effective means, by which the Hindus will get political power, and, with it, the possibility of every kind of national glory, within India, and outside India, one day.
Excerpt taken from http://www.savitridevi.org/works.html