“George Russell, a composer, educator and theorist who had a powerful effect on the jazz forms and methods that have evolved from the 1950s to the present, has died. … A MacArthur Foundation Award winner, a National Endowment for the Arts Jazz Master and a Distinguished Artist-in-Residence Emeritus at the New England Conservatory, where he taught for 35 years, Russell died Monday in Boston of complications from Alzheimer’s disease.”