alt Hacker NewsA third of a half who were believers.
So of the entire populace of Milligram participants, 16.5% believed and obeyed.
That's a much, much smaller claim than the popular belief of what Milligram presented.
However, it's still possible that you only need ~16.5% to believe & obey authority for things like the Nazi death camps to occur.
We immediately only need to consider the half that believed the situation was real, if we are concerned with what people do in believably real situations.
Even if we take the 16% though, that's one in six people willing to deliver very obvious direct harm and/or kill another human from exceptionally mild coercion with zero personal benefit attached other than the benefit of not having to say "no". That is a lot.