Erick Erickson at Redstate.com managed to get a hold of her thesis, and they declare she is definitely a socialist:
This proves Elena Kagan is an open and avowed socialist. The woman declares that socialists must stick together instead of fracture in order to advance a socialist agenda, which Kagan advocates.
You can see for yourself right here (PDF).
Keep in mind that Kagan wrote her thesis at the height of the cold war praising a group that collaborated with our enemies
I haven’t read it yet and probably won’t tonight, but I’m sure a few of you will love to pour through this. Please let us know what you find in the comments!
UPDATE: I’ve uploaded the PDF to my site as well here (PDF), in case you are having trouble getting it from Redstate.