"On the whole it was a failure because of the dichotomy between the nation-state's legal principles and the methods needed to oppress other people permanently. This failure was neither necessary nor due to ignorance or incompetence. British imperialists knew very well that 'administrative massacres' could keep India in bondage, but they also knew that public opinion at home would not stand for such measures. Imperialism could have been a success if the nation-state had been willing to pay the price, to commit suicide and transform itself into a tyran "On the whole it was a failure because of the dichotomy between the nation-state's legal principles and the methods needed to oppress other people permanently. This failure was neither necessary nor due to ignorance or incompetence. British imperialists knew very well that 'administrative massacres' could keep India in bondage, but they also knew that public opinion at home would not stand for such measures. Imperialism could have been a success if the nation-state had been willing to pay the price, to commit suicide and transform itself into a tyranny. It is one of the glories of Europe, and especially of Great Britain, that she preferred to liquidate the empire." - Hannah Arendt, The Origins of Totalitarianism

I would argue, that British Imperialism did not commit suicide but rather shifted strategy: control of internal currencies via the central banking system(s) and the likes of the World Bank, International Bank of Settlements and IMF to name but a few mechanisms.

peaceably