Chapter 3 discusses the concepts of discrimination, sexism and childism. It firstly presents the concept of discrimination under international law. Secondly, it explores the notions of sexism and ‘childism’. It discusses paternalism, child liberationism and the challenge of protecting the girl child while promoting her autonomy rights. It studies theories concerning the interests of children as well as the common vulnerability approach, Arnstein and Hart’s ladder of participation, and the possibility of granting autonomy rights to girls at adolescence. Thirdly, it examines the public/private divide at the international and domestic levels and how it impacts the girl child globally. Chapter 3 thereafter explores the notions of universalism and cultural relativism, as well as the evolving meaning of culture, and their significance for the girl child. In this context, the chapter also analyzes the conceptual division between the Global South and the Global North.