Dr André Diederen (TNO) has researched the issue of minerals scarcity and it's relevance to energy security and geopolitical stability.
Below you will find a three part presentation my Dr Diederen on the issue titled
Materials Scarcity, Managed Austerity and the Elements of Hope
Unfortunately the audio is of quite bad quality, so here's a taster of the main points in the presentation.
Most inside the earth is not producedable. Flow matters. Not stocks
Resources are not Economic reserves. Only economic reserved matter.
Metals scarcity => Wind Energy scarcity.

Scarcity for Other Alternative Energy Production Systems.
Solution: Simplify (less exotic materials) and compromise performance
Summary: Performance Maximization is Dead. Frugal Optimization is Back.
In short, there is a systemically positive feedback loop with very negative consequences between the energy and materials scarcities.
If you are a materials-wisened inventor with understanding of basic and rare earth metals, you better get started if you haven't already. Time to optimize & save.