Simone de Beauvoir is a prominent philosopher recognized for her extensive work on feminism and ethics. Her groundbreaking book, "The Second Sex," examines women's oppression and the societal constructions of gender. De Beauvoir's existential philosophy paved the way for contemporary feminist thought, emphasizing the importance of female agency and liberation. Her ideas challenge traditional notions of femininity and argue for women’s independence and equality. Through her intellectual contributions, she has profoundly influenced feminist philosophy, ethics, and the broader discourse on gender relations.