http://en.wikipedia.org/wiki/Saul_Alinsky
In Rules for Radicals (his final work, published one year before his death), he addressed the 1960s generation of radicals, outlining his views on organizing for mass power. A young Hillary Clinton was a major admirer, writing her undergraduate thesis on his work and ideas.
It goes into her biography, explaining how she became a radical leftist.
Evidently how her Methodist minister-I think his name was Donald Williams, but I could be mistaken-exerted a huge influence on her, as well as the actions of Mr. Alinsky.
Supposedly that's what her sealed thesis is about.
Her mother was also a flaming liberal.