IN A RECENT TALK GIVEN BEFORE THE STUDENTS OF THE SCHOOL OF Commerce in Paris Monsieur Michel Debré identified three forms of political oppositions : programmatic opposition typical of the ‘Anglo-Saxon countries’ opposition to the regime, prevalent in the Third and Fourth French Republics and revolutionary opposition, directed against the social and economic order. Unless the French Communist Party, he noted, accepts the republican regime based on peaceful alternations of the government and unless, he added for good measure, it ceases to be influenced by an outside power, it cannot become an ‘opposition’. The only opposition that is acceptable, he concluded – and nobody who knows Mr Debré's political career under the Fourth Republic can miss the irony – is the one that recognizes the legitimacy of the institutions and acts for the purpose of replacing the government.