In 1949, French intellectual Simone de Beauvoir wrote that "no biological, psychological or economic fate determines the figure that the human female presents in society" and "one is not born, but rather becomes, a woman," an idea that was picked up in 1959 by Canadian-American sociologist Erving Goffman and in 1990 by American philosopher Judith Butler, who theorized that gender is not fixed or inherent but is rather a socially defined set of practices and traits that have, over time, grown to become labelled as feminine or masculine. Goffman argued that women are socialized to present themselves as "precious, ornamental and fragile, uninstructed in and ill-suited for anything requiring muscular exertion" and to project "shyness, reserve and a display of frailty, fear and incompetence."