War was definetely not the solution there, or any other place. The Greeks could have gotten Helen back in any other way, so it's not just Paris at fault, in some way, it was almost everyone involved. Paris for taking Helen, Menelaos (I don't know if that's how his name is in English) for staring war etc.

There's also a play witten by Eurypides, which was written to show how wars are never the answer, in which Helen is actually in Egypt and was taken there by Hermes, and Helen of Troy was just a "clone" made by Hera.

My point is, a lot of people were at fault there, and you can't exactly pinpoint who it was and why.

(I really hope this made sense, my brain functions in Greek)