We just had a Clausewitz post yesterday with his opinion of the French, and it was highly complementary. The lesson of history is that as a nation actually becomes civilized, it loses it's interest in human butchery. We just haven't quite got there yet, though we unquestionably have come a long way in the last 50 years.
I am not quite sure about the nature of your post. The US is the most advanced nation in the history of humankind.