I would really love to read such a book! I have been researching a lot on this topic myself, to be honest. Specifically about why India and China (the "East") are so far behind the west. And in the case of India at least, the fault lies a lot with the way history is taught. It is assumed that India was a mostly agrarian economy and the people had no way of defending themselves from superior European guns. While that is partly true, it also had a huge industry in both firearms and metal working before the British conquest, apart from Textiles.

So for India I could understand that colonialism created a West-oriented culture, but couldn't see why so in China, which was never under a foreign power. Your point about the rulers and intelligentsia being westernized makes sense in this context.