How to Love a Child (Jak kochać dziecko), published in four volumes between 1919 and 1920, is Korczak's longest and most systematic work. Organized around the concentric circles of the child's life — the family, the boarding school, the summer camp, and the orphanage — it combines pediatric observation, pedagogical practice, and moral argument into a single sustained meditation on what it means to take children seriously. The title's use of the word "how" signals Korczak's methodological commitment: love is not a feeling but a practice, and the practice can be articulated, taught, and refined. The book's recurring message — that respect precedes affection, that accompaniment matters more than instruction, that the child's present has full moral weight — ran through four decades of Korczak's subsequent work and became the operational manual for generations of progressive educators.
The book's structure traces an arc from the biological to the institutional. Volume