I can think of thousands of components that can hold trillion dollar industries hostage.

I challenge you to name one that cannot and that also makes it into high school curricula or How Things Work.

https://mst3k.fandom.com/wiki/A_Case_of_Spring_Fever_(short)

https://m.youtube.com/watch?v=vzKfAFsbRSk

If you are not ready to lock yourself in a bunker after reading the article and watching that short, I strongly suggest you consider the inclined plane.

You’d better do it now. Very few locks work in the absence of transformers, springs and inclined planes.