What Every Woman Knows is a play written by J. M. Barrie in the early 20th century that humorously yet critically explores gender roles within the Scottish Wylie family. While the brothers James, Alick, and David embody practicality and ambition, their sister Maggie is portrayed as yearning for love and recognition. She develops feelings for the ambitious young student John Shand but struggles within a male-dominated society that limits her voice. The play reveals how women’s wisdom and devotion often lie behind the visible success of men. Ultimately, Maggie’s character transcends romance to highlight the essential yet overlooked influence of women, offering a sharp reflection on social expectations.