Hablas tu Ingles?
<What are you trying to say?
Seemed clear to me. "When all resources run out" isn't null, it's inevitable... unless a catastrophe drastically reduces the planet's population. Can you say "Malthus"?
Of course, they won't all run out at the same time, and the loss of a critical few will precipitate that catastrophe and save the remainder. Say, for instance, drinkable water, or arable land, or the food that can be grown on it...
Getting the picture yet? Rent the movie Soylent Green - not for Heston's usual overacting or E.G. Robinson's poignant last performance, but for the backstory. What's important, and frightening, is not that "Soylent Green is people!" - it's why.