I think this article: http://www.independent.org/blog/?p=3596
by robert higgs on basic concepts of political nature and the ways our ideas get effectivley controlled by our current system is an excellent introduction to go back to basic liberal ideas, for a novice. It is short, clear, and radical for an introduction. A good start point to see where a person you wish to address is on their opnion without being too “preachy”.
On a side note, could any “radical” leftist article feature the Democats in the same light when mentioning basic republican tactics?