A short story on Reinforcement Learning

I hope that you've come across, from algorithms achieving super-human level performance at Atari 2600 games, beating professional players at GO, Dota 2 and StarCraft II and to algorithms controlling nuclear-fusion reactors. These are the success stories of reinforcement learning algorithms combined with deep learning (Deep Reinforcement learning or DeepRL). Google's DeepMind and OpenAI heavily does research in this area and thinks that DeepRL is the future of AI. Some Researchers even think that RL might be the key to Artificial General Intelligence (AGI). Reinforcement Learning (RL) is one of the paradigms of Machine learning along with supervised and unsupervised learning.