[jeffbee]

If you don't analyze it properly there's always the risk of condensation in the walls, but that risk is far higher from uninsulated walls. With uninsulated cavity walls you have room temperature + room humidity on the interior, and a sharp gradient to outside temperature within the wall, where all the moisture condenses in the winter. Worst possible situation.

There's tons of published guidelines about moisture in insulated walls. The easiest thing to build without making some fatal mistake is to put the insulation on the exterior, with a ventilated screen between it and the wall cladding. The best solution also depends on your local climate. See e.g. https://www.nrel.gov/docs/fy13osti/56709.pdf