I will discuss the classical 1d Ising model with interactions decaying as an inverse power of the distance, 1/r^p. This model exhibits a rich phase diagram and boasts an illustrious history. As shown by Dyson in 1969, there is a phase transition at a positive critical temperature for all 1 < p < 2. It is well-established that the critical model exhibits exact \mathrm{SL}_2(\mathbb{R}) invariance, leading to a family of nonlocal 1d conformal field theories (CFTs), which are perhaps the simplest CFTs that remain unsolved analytically. After reviewing the history and physics of the model, I will describe a recent complete solution of the critical dynamics near p=2. Based on https://arxiv.org/abs/2412.12243 with D. Benedetti, E. Lauria, and P. van Vliet.