Fair warning, this video is pop science and therefore prone to many of its pitfalls, but when viewed in context I find Kurzgesagt[0] did an nice summary of this

Fair warning, this video is pop science and therefore prone to many of its pitfalls, but when viewed in context I find Kurzgesagt[0] did an nice summary of this addiction theory. [0] https://www.youtube.com/watch?v=ao8L-0nSYzg https://www.youtube.com/watch?v=ao8L-0nSYzg