A founder of modern jazz who rewrote the rules of drumming in the 1940s and spent the rest of his career breaking musical barriers and defying listeners’ expectations. He was the last surviving member of a small circle of adventurous musicians — among them Charlie Parker, Dizzy Gillespie, Thelonious Monk and a handful of others — whose innovations brought about wholesale changes in jazz during World War II and immediately afterward. Their music, which came to be known as bebop, had its roots in the jazz tradition, but it was different enough to scandalize many listeners and even many of their fellow musicians. Maxwell Roach was born on Jan. 10, 1924, in the small town of Newland, N.C., and grew up in the Bedford-Stuyvesant section of Brooklyn. He began studying piano at a neighborhood Baptist church when he was 8 and took up the drums a few years later. Even before he graduated from Boys High School in 1942, savvy New York jazz musicians knew his name. As a teenager he worked briefly with Duke Ellington’s orchestra at the Paramount Theater and with Charlie Parker at Monroe’s Uptown House in Harlem, where he took part in jam sessions that helped lay the groundwork for bebop. His daughter Maxine survives him. Mr. Roach, who was married three times, is also survived by two other daughters, Ayo and Dara, and two sons, Raoul and Daryl.