[lancer]

That is an extremely limited view. There is also Lenin. Stalin. Trotsky. Mao.

Depends on the meaning of "is." (:-)

The question was Who is a truly influential liberal mind in our culture?

The names you mention bring to mind the word "was."

[expatpat]

The mind of Marx, in the form of his writings, IS still very influential in the liberal culture.

[blanknoone]

The names you mention bring to mind the word "was."

They are just as influential on the left as ever.