That's pretty much it. It can be anything or anyone, even a limitation to what Humans can do and anything that makes our lives harder.
Imagine if [example] never existed, how will that benefit everyone in the world?
I personally choose the need for Humans to sleep. Imagine how many more hours we can be productive (or recreate) each day.
What do you think will benefit us if it doesn't exist? War? Crime? Disease? Yes, those are answers, but they're not interesting ones!
geK0:
Also this Aerostream1908 guy..... he's a poopoo head!
D=