To explain the evolution of the EU, a macropolitical approach using ov
erall aggregate data is taken. Four dynamic views are tested: the neof
unctional/neofederal assumption of linear growth; the realist view of
decline; the governance/pendulum view of cyclical up and down; and the
fusion thesis view of structural growth and differentiation. The arti
cle uses five indicators: binding outputs; scope enlargement of public
policies; transfer of competencies; institutional growth and procedur
al differentiation; and involvement of intermediary groups in channels
of influence. The data point to trends of merging public resources at
several state levels, leading to increasing complexities, a lack of t
ransparency and difficulties in reversing the development. This ever c
loser fusion is explained as a dynamic product of rational strategies
of European welfare states faced with growing interdependencies and sp
illovers, furthered by the institutional logics of EU bodies. Criticiz
ed for the lack of legitimacy and the entailing of national democratic
constitutions, this new polity may be perceived as a new stage in the
evolution of European states and - more open to critical debate - a n
ovel form of representative government.