A former resident of France comments on dual citizenship:

Infused as he was with a liberal disposition, Aron’s views on multiple citizenship and dual nationality were pessimistic. In his 1974 article, “Is Multinational Citizenship Possible?” he clearly considered it an anachronism, totally incommensurate with the logic of the sovereign-state system. Aron argued that multiple citizenship could not break the indelible link between the individual citizen and his nation-state. Citizenship, according to Aron, was a special relation between the individual and the state; citizenship defined the state’s rule within a specific territory, and in turn the state determined who its citizens were and what rights and obligations bound citizens to the state.

 The Opium of the Intellectuals among other works by Raymond Aron is covered by Roger Kimball in the May 2001 issue of the New Criterion. Well worth the read.