The Impact of European Integration on Private Law: Reductionist Perceptions, True Conflicts and a New Constitutional Perspective

If private law is defined simply as a matter of core areas such as substantive contract, torts, property or family law, it may be doubted whether European law has significantly affected national private law systems; or conversely, whether national private law is relevant to European integration. However, this paper argues that such conclusions are misleading: while there have been very few European interventions into the core areas of civil codes or the common law, the integration process has impacted forcefully upon deeper structures of national legal systems. Challenging the institutional embeddedness of national private law, European primary and regulatory law has remodelled (public) concepts of private autonomy, the realm of private governance and the social responsibility of private actors. How then to present and evaluate this indirect impact? Drawing upon concrete examples, this paper seeks first to understand this European challenge to the interdependence of national private law, borrowing from political science's analytical tool of multi‐level governance to highlight the complex interrelations between European rights and regulatory law and national private law; and secondly attempts actively to assess the legitimacy of the impact of integration upon private law with the aid of the explicitly normative theory of deliberative supranationalism. However, precisely because Europe remains in a state of flux, and dependent upon contingent political processes, no final conclusions are drawn: as is the case with so many areas subject to integrationist logic, the contours of the ‘new European private law’ cannot be laid down in advance, and are instead a long and weary matter of cooperation and fine‐tuning between national and European judiciaries.