This introduction presents an overview of the key concepts discussed in this book. The book examines whether there is a biological basis for behaviour, implicitly presenting a modern notion of gender binary that has been increasingly questioned and challenged in the twenty-first century. It looks into a middle-class British white woman's experiences in feminism, social justice, and education from the 1980s onward, within a partly autobiographical account of her intellectual journeys with feminism in her studies of Gramsci. The book includes the works of Ruitenberg and Emma Renold and Jessica Ringrose. It analyses Mill's The Subjection of Women as a pioneering work in liberal feminism. The book discusses 'manly aggression', its causes and potential value. The first stirrings of feminism were thus some of the earliest calls against inequity in social and legal practice, and against the view of women's natural inferiority to men.