Basically should the US, or any other country for that matter, do things like send mobile airbases/desalinization plants to disaster zones or take shots at killing foreign enemies (or would-be enemies) that do not pose a clear immediate threat. Or would the world be better served if we all just minded our own business.

Personally I lean towards intervention but am still kind of ambivalent, on a scale of 1 to 10, 1 being total isolationist, 10 being "we should have invaded Nazi Germany in 1939" i'd probably rank as a 6.