What specific fair and balanced non-polemic books and articles should I read in order to address the following question

What specific fair and balanced non-polemic books and articles should I read in order to address the following question: Is there some similarity, and if so what is it, between (X) the stated economic principles of communism in reducing economic inequality in society, and (Y) the principles of movements in the US presently advocating the reduction of economic inequality in the US?