With respect to recent trade negotiations, specifically addressing rare-earth metals that now come almost exclusively from China:
In September 1962, the American comic strip Dick Tracy started a long series about travel to the Moon aboard a magnetic space coupe.
For most of that series, the subtitle "The nation that controls magnetism will control the universe" appeared.
See the blurb about the magnetic space coupe in
https://www.dicktracymuseum.com/new-pageRare earths are not particularly rare, but they are very dirty to refine.
The main region for mining them in China was run for a while by a criminal organization, but the local government suppressed them.
However, the refining process is environmentally filthy, even by the standards of the PRC.
At one point, the PRC negotiators were thinking of restricting the end user to non-military uses, as the US has done with some technologies in the past sent to China.