Has anyone read Late Victorian Holocausts, a full exposition of this argument? It's important if true.
However i have read about the Economist Utsa Patnaik's works on the same subject where she makes the argument that Colonialism/Imperialism gave rise to and sustained today's Capitalism. There is a direct correlation which is well supported by available facts. Whether we want to face it or nor is another matter.
Some of her works can be accessed from my other comment: https://news.ycombinator.com/item?id=33979856