Simone de Beauvoir significantly impacted women's rights through her writings and speeches, notably in her book "The Second Sex." Her work examined the social constructs surrounding gender and criticized patriarchal norms, calling for women's liberation and equal opportunities. De Beauvoir's existential philosophy encouraged women to define their identities beyond traditional roles, inspiring feminist movements worldwide. Through her literary and philosophical contributions, she emphasized the importance of autonomy and empowerment, fostering a deeper understanding of women's rights and societal expectations, crucial for the feminist movement's evolution.