Not looking to pick a fight but.. there's only seven stories in the world.

there's only seven stories in the world

There isn't. That's a completely nonsensical statement, no serious scholar of litearture/film/etc. would claim something of the sort. While there have been attempts to analyse the "basic" stories and narrative structures (Propp's model of fairy tales, Greimas' actantial model, Campbell's well-known hero's journey), they're all far from universally applicable or satisfying.