'It originated with Greek and Roman Theater when a mechane would lower a god or gods onstage to resolve a hopeless situation.'

I don't think 'mechane' is a word. Did you mean 'machine' or 'mechanism'?

'Without his deus ex machina, the boys would have continued with their bloodthirsty rampage, and probably kill every single boy on the island.'

Do you think the last one would have committed suicide?

I think it's more likely they'd have reached some sort of equilibrium eventually.

Interesting. Now I finally know what that term means. Thanks for that.

Nice example too. Your essay could have been a little longer, but I still liked it. Good job!