United States foreign policy has often followed a "you break it, you buy it" policy of rebuilding the (former) enemy nation after war's end. The U.S. invested considerable money in Germany and Japan after World War II, and have spent equally as daunting amounts rebuilding Iraq and Afghanistan.
Was it proper for the U.S. to rebuild Japan after dropping the atomic bomb? Was it proper for the U.S. to rebuild Germany after the Berlin wall collapsed?
Does the victorious nation in the aftermath of war have a responsibility to rebuild the losers?