I recently just finish reading the Ascent of Money. The book was sort of financial history of the world. Just like many of our new technologies originated from defense related researches, many early day financial innovations (joint-stock companies, bonds) were linked to the finance of wars and empire building.
Specifically in more details were the commercial and financial motivations behind the British empire expansions. And this echos the same motivations behind the early (or even the present day?!) American empire building, as explained in Addicted. The followings are quotes from Addicted, supposedly by the business & political leaders in the US in around 1900.
"Our condition at home is forcing us to commercial expansion... Day by day, production is exceeding home consumption... We are after markets, the greatest markets in the world."
"I firmly believe that when any territory outside the present territorial limits of the United States becomes necessary for our defense or essential for our commercial development, we ought to lost no time in acquiring it."
Remember, in 1900, the PR techniques were not as refined. They said what's on their minds. Now the pretext would be to promote democracy, to bring down trade barriers, etc...
The first quote is interesting, because it has present day application and comparison. This is the prism through which the reemergence of China is examined and judged. In my opinion that's the logic why people do not buy the "peaceful raise" slogan.