What does GDP have to do with resources? GDP measures volume of transactions. Resources are oil, gas, silver etc. Also, there is real estate. Land on Earth is limited. There are 10s of millions of people who want to live in Malibu, for example. But, number of spots there is limited, so who is going to live there? Those who have the most money.<p>Do you get it now - more people alive means more competition for land and other resources.