That the West got wealthy from the Industrial Revolution is a commonly accepted fact AFAIK.
We didn't steal that wealth from Africa, in part because Africa had very little wealth.
I don't have a great link laying out this in more detail, but I know Johan Norberg has written and talked a fair amount about this.
Aren't natural resources wealth? Isn't forced work wealth? "Stealing" seems like the best word to describe the situation without obfuscating the matter with grander narratives (the kind that might win you the "Nobel prize" for economy, incidentally).
You could also see it as a double condemnation of colonialism - not just immoral, but an economically useless endeavor.
Looking to the future, I'd prefer colonialism not be considered a lucrative strategy (though the thesis doesn't deny that colonialism was profitable for specific interest groups - just that those groups were a small part of the newly industrializing economies, and that the nation-level balance sheet gained little from their pillaging, compared to the costs of empire-maintenance).