I think I read something different from what you really meant, because that's not true by the very definition of resource.

I meant items like food, water, appliances, etc. Otherwise, yes, we're down to a semantic quibble over what "resource" means, which I don't think is very helpful.

I don't think it's silly, in the sense that the future will see a lessening of national borders and national exploitation of resources.

Certainly it is. If there are not enough resources to keep seven billion people at a reasonable standard of living, what possible incentive is there to share?

There are already strong immigration/emigration fluxes, and the future is probably going to bring about an increase in population

Let me just leave this here.