These learned behavior of traditional roles are decreasing with the onset of equal rights. Still though, parents tend to treat sons and daughters differently from the time of birth. Gender role stereotyping also occurs in the media, commercials, magazines, and movies. Children pick up on all of this, and the gender stereotyping becomes learned. This is socialization at work in society.
Gender inequality equals economic profit for some.
Men's job opportunities and incomes increase if women remain unequal. When WW II started and men were called away to war, it was the women who were called in to keep the factories running. Now the majority of Americans claimed they needed married women in the workforce. Women had their foot in the door, so to speak. When men returned home from the war, they needed their jobs back, and again Americans returned to their original idea of married women should not be hired.