In late January, the Obama administration issued its first unequivocal reaffirmation of the strategy of democratic enlargement that has guided Western thinking since the collapse of the Iron Curtain two decades ago. Speaking in Paris, Secretary of State Hillary Clinton reminded us that NATO and EU enlargement created an unprecedented degree of stability and security in the eastern half of the continent, that Russia too had benefited from this stability, and that it was critical that Europe’s doors remain open to further enlargement.