As background: I took AP physics in high school and I did a chem & math double major in college, but otherwise self-taught knowledge of physics. Last summer I heard an interview on NPR with Chanda Prescod-Weinstein about her book "The Disordered Cosmos" so I read it. I am a Black female scientist so I was attracted to the book because of its social commentary on the marginalization of black women/femmes within STEM fields, but I found myself very much interested in the physics parts of the book, most of which I was pretty much unfamiliar with. So I read "The universe in a nutshell" by Stephen Hawking and "the theory of relativity and other essays" by Albert Einstein. The Einstein essays are from the 1930s and 1940s (almost a century ago) and he talks about his skepticism of quantum mechanics and his pursuit of a field theory to explain elementary particles of matter. So my question is, has physics made any progress in the past hundred years towards this? Have physicists made progress to describe motion and energy on the subatomic scale using relativity, or do they only use wave/particle models?