heres the problem... societies indoctrinate (or at least attempt to) the people within them, so theres very little universal belief. sanctitiy of children, at least male ones, seems to be rather common, i don't know if its universal. the romans claimed the carthaginians sacrificed children... who knows how much of that is true and what was propaganda for their citizens.
actually, the biggest problem is that your discussion group there probably knows little about the vast majority of cultures so you couldn't possibly know what was universal...