The ’90s was a revolutionary time in R&B: Not only had the mature, quiet-storm-oriented sound evolved to its most sophisticated state, you started to really hear the influence of hip-hop—a shift that changed not only R&B, but the sound of modern pop in general. From neo-soul to new jack swing, the classic-sounding to the more cutting-edge, these are the tracks that shaped R&B in the ’90s and early 2000s. Our editors update picks regularly, so if you hear something you like, take a minute and add it to your library.