Business law is a state issue in the U.S. The reason that the U.S. has one set of legislation (more or less) is that 50 states (well, 49) have voluntarily adopted the Uniform Commercial Code. There is absolutely nothing stopping Europe from doing the same or similar except lack of political will.
Louisiana. I guess it's difficult to reconcile parts of it with the Code Napoleon. All other states have English common law as the basis of their legal systems.
Turns out political will is a hell of a lot easier in a single country like the US, than 27 like the EU. Especially when the US has fucntionally one language, and the EU has who-knows how many.
