Who Were the Sea Peoples?

Often, atheists who want to note the "injustice" of Christian doctrine cite the concept of original sin as an example. (They rarely note that they are using a concept of justice that they have borrowed from Christianity in the first place, but never mind that for now.) "How," they ask, "can a just God possibly be punishing people today for something done by two people thousands of years ago? The idea is barbaric!" As I understand original sin, such questioners have gotten the concept all wrong. And I do not think this understanding is merely mine: I also think it is the correct understanding of the doctrine. But I do realize this will not be held universally. So what does original sin mean, as I see it? Well, what happened to create this sin? (And in the following, I think it makes little difference whether you take this story literally or metaphorically, so do whichever you wish.) God told Adam and Eve not to eat from the tree of the knowledge of g...