The works of Igor Stravinsky, James Joyce, and Luigi Pirandello reflect the value of modernism. Modernism was characterized by a break from traditional forms and an exploration of new techniques and ideas, which is evident in the innovative music of Stravinsky, the experimental narrative style of Joyce, and the exploration of identity and reality in Pirandello's plays. While elements of surrealism and cubism can be connected to their work, modernism is the overarching movement that best encapsulates their contributions in the post-World War I context.
Final answer: modernism