Lewisian politics

Anybody know much about what the political views of David Lewis were like?  From vague memories of some scattered comments in his writings, as well as the probabilities concerning any given academic, I'd always vaguely put him somewhere on the spectrum from moderate left to not so moderate left, but I don't recall anything solid enough to decisively rule out the possibility that he was either centrist or radical left (it would rather shock me if he were right-wing).  If anybody knows anything definite, I'd appreciate hearing both where they think he was and why.