Isn't socialism un-American?
For socialism to be un-American its aims must be not in accord with the spirit and tradition of the American people. Is that the case? What could be more American than the socialist goals of social justice, equality of opportunity, economic security, and peace —all American principles expounded in the Declaration of Independence and the Constitution? And have not these always been the professed ideals of our greatest statesmen?
The socialism of Karl Marx is a science. Like all other sciences it is universal and has affected directly or indirectly the thinking of millions in every corner of the globe—including America. But the test of whether an idea is American or un-American is not where it came from but whether it is applicable to America.
Huberman and Sweezy, "Introduction to Socialism," Monthly Review