Actually up until about 1970, we lived in a world where it was thought we had unlimited natural resources. The last 50 years since that time have been anomalous in terms of American history.
You could easily replace the word renewable with unlimited and the meaning in terms energy would be about the same.
Right now renewable also means higher cost energy. In the future however renewable will also mean lower cost energy. That’s when the real revolution begins.
When someone pays serious attention to the 200 field equations by James Clerk Maxwell as field equations instead of throwing out all but four and turning those into vector equations may be something along those lines is possible ... those four are the basis of everything we know about the entire electromagnetic spectrum - without Maxwell, Einstein would have remained a doodler in the patent office, and Tesla would never have discovered alternating current, there would be no cell phones, no transmission of electricity. If you had any of those things it would run on 12 volt DC and use wind up cranks to charge batteries.
So what lies in those 196 equations? Who knows. But there are apparently hints of unlimited free energy, instantaneous communication, and the ability to step from one place to another - no matter the distance: feet, miles, light years - all the same.