Madame de Staël was a French writer and intellectual during the late 18th and early 19th centuries, known for her influential works on literature, politics, and society. She played a crucial role in the Romantic movement by advocating for emotional expression and individualism, which contrasted with the Enlightenment's focus on reason and rationality. Her salons were a gathering place for many key figures of the time, where ideas around Romanticism flourished.