https://castlelab.princeton.edu/what-is-rl/
What is Reinforcement Learning
Warren B Powell
Professor Emeritus, Princeton University
“…I provide a brief introduction to modeling sequential decision problems… and then designing policies. As I watch the evolution of the work taking place under “reinforcement learning,” my belief is that eventually the RL community will have to recognize the space of sequential decision problems… and all four classes of policies…”