Mill begins by addressing the natural differences argument, which claimed that women were naturally inferior to men. He refutes this by asserting that such beliefs are the result of social conditioning rather than inherent nature. Mill argues that women's abilities are stifled by lack of opportunity and education, and that given equal chances, they would demonstrate capabilities equal to men's.
He further argues that the subordination of women is a hindrance to human progress and that society would benefit greatly from the contributions of women if they were allowed to participate equally. Mill supports his arguments with examples from history and contemporary society, demonstrating how the liberation of women leads to overall societal advancement.