Bill Ayers, April 6, 2008 (from his website) : "Imperialism. I’m against it, and if Sean Hannity and others were honest, this is the ground they would fight me on.
Capitalism played its role historically and is exhausted as a force for progress: built on exploitation, theft, conquest, war, and racism, capitalism and imperialism must be defeated and a world revolution—a revolution against war and racism and materialism, a revolution based on human solidarity and love, cooperation and the common good —must win. We begin by releasing our most hopeful dreams and our most radical imaginations: a better world is both possible and necessary.
Source: http://billayers.wordpress.com/2008/04/page/2/
Note: Ayers is very likely quoting Bob Avakian, chairman of the Revolutionary Communist Party, with the phrase 'both possible and necessary' in regards to a communist overthrow of the US government. See these Yahoo search results for "bob avakian" + "possible and necessary"--Eye On The Left