sds/mds (students for a democratic society/movement for a democratic society)is a multi-tendency, multi-issue ANTI-IMPERIALIST organization and movement open to all. sds back in the 60s was the group that launched the antiwar movement opposed to US intervention in Vietnam and its relaunching in 2006 was to evoke, in the era of the Iraq War (another FAILED imperialist military venture) the anti-imperialist tradition (at least in the US) to which sds is so central.
Analyzing imperialism and communicating what it is (in part with an eye to bringing anti-imperialism into the political mainstream, at least of the grassroots of the Democratic Party and progressives generally) is part of sds/mds's mission -- but of course mobilizing a mass militant movement to oppose it in practice is really crucial. It is important that our 'talking' at least be tied to some kind of 'doing' or 'walking', for that talking and thinking to be fully meaningful:
http://studentsforademocraticsociety.org/home/and our active wiki:
http://newsds.org/wiki/index.php?title=Main_Page