On the 40th anniversary of the Children's Literature Assembly (CLA), it seemed appropriate to document and reflect on where the assembly has been, and to discover how the organization that is so valued has evolved. Knowing the history is helpful for framing the future, not only of the organization but also of the field of children's literature. It is a story that transcends geography, professional role, age, ethnicity, and gender. This article details the history of the Children's Literature Assembly from its inception in 1975 to the present day. The historical roots of various aspects of the organization are explored, including the organization's beginnings, publications, events at National Council of Teachers of English (NCTE), the Notable Books, advocacy initiatives, and the CLA Endowment Fund.