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As a first question, lots of time, effort and Euros have been spent on the Common Frame of Reference and discussion of a proposed "European Civil Code". Consider that neither Canada nor the United States have managed to achieve such national legal unity, and their respective consituent provinces and states have a far weaker claim to sovereignty and independence from each other than do the Member States of the EU. If one eliminates legal diversity by replacing national civil codes with a European one, does not that imply that the achieved unity has stripped out one of the "common" driving forces for unity and continental peace? Should there be a European Civil Code or does this violate inherently the principle of subsidiarity and thus undermine the very notion, and threaten the existence, of the Member States?