For 50 years, San Francisco’s Kronos Quartet—David Harrington (violin), Gabriela Díaz (violin), Ayane Kozasa (viola), and Paul Wiancko (cello)—has challenged and reimagined what a string quartet can be. Founded at a time when the form was largely centered on long-established, Western European traditions, Kronos has been at the forefront of revolutionizing the string quartet into a living art form that responds to the people and issues of our time.