Patriarchal dominance
In Trifles, the men believe that they grant female identity by virtue of the women's relation to men rather than through their inherent qualities as females. Except for the absent Minnie Wright, the women have no first name and take their husband's last names, despite being the protagonists of the story instead of the named male characters. This institutionalized male superiority is so pervasive that the men feel comfortable in disparaging Mrs. Peters and Mrs. Hale's interest in "trifles," with the clear implication that the women are too flighty and small-minded to worry about important issues such as the investigation at hand. In addition, when the men observe the troublesome state of the kitchen, they immediately conclude that the woman must be at fault in her homemaking abilities because they all know John Wright as a good, dutiful man and in consequence form a unified front protecting John Wright's reputation. Because of this male solidarity, Mrs. Peters and Mrs. Hale can only aid Mrs. Wright if they ally with their own gender.