Nos pluralistes, by Alexander Solzhenitsyn

Alexander Solzhenitsyn criticizes the moral emptiness of pluralism and its impotence when faced with the evils of socialism. He also criticizes the work of some of his fellow Soviet exiles, who blame the failures of socialism on the defects of the Russian people and their culture, rather than on the nature of socialism itself. 

This book is an excerpt from a longer work, The Oak and the Calf, and I did find parts of it difficult to follow because I am not familiar with the work of the people Solzhenitsyn cites, but it was a worthwhile read nonetheless.  Maybe reading it as part of The Oak and the Calf would provide more context.