I often think about the consequences of everything being interconnected. (That's a good Buddhist principle to think through.) I am fascinated by ripple effects--things that happen at x degrees of indirection from you as a result of something you do. Things you may never (and likely won't) know about. It lines up with my interest in things just beyond seeing/hearing, too. Everyone wants to be immortal, or at least remembered through time--and without even being conscious of it, everyone is.