Answer
Modern art owes much of its development to the influence of Gertrude Stein's salon. Held at her Parisian home, it attracted a circle of avant-garde artists, including Picasso, Matisse, and Braque. Stein's critical eye and encouragement fostered the development of new styles and movements, such as Cubism and Surrealism, which broke away from traditional conventions and revolutionized artistic expression.