The book "The History and Theory of Children's Citizenship in Contemporary Societies" offers a comprehensive analysis of the concept of full citizenship for children. It examines the historical development and intellectual discourses spanning approximately 2500 years, shedding light on the moral and ideological positions surrounding this topic. Various cultures, traditions, and beliefs, particularly from Europe, are taken into account. The work reflects on the subject from different disciplines, including social sciences, theology, and philosophy, positioning children's citizenship at the center of the discussion on children's rights. A critical aspect of the book is the engagement with the concept of children's participation, which often distracts from viewing children as full members of society. Instead, a children's rights-based approach is pursued, focusing on the relationship between children and the state as potential full citizens.