How can the sharing of resources in a relationship cause interpersonal conflict army?

The answer to this question is THE LESS RESOURCES THERE ARE, THE MORE COMPETITION THERE IS TO ATTAIN THEM.
Since the needs for the resource is not depleting while the availibailirty is  depleting, the only things that huamans could do in order to satisfy our needs is by fighting of/competing against each other in ordert to obtain as much resource as possible