Hmmm. Capitalism is really more Social Darwinism....which would be America, btw. Credit for that term and idea given to Andrew Carnegie, known as the Major Captain of Industry.
Also, the point Luna makes is moot, current-day Britan is hard to consider as the same thing as Colonial Britian. If you DO want to look at it like that, however...Britan sucks 10x more then they do now. Not that America doesnt suck too, but Britan has more Suckage then the US, even without all the extra-suckage from their colonial days.