Final answer:
The birth of nursing theory can be attributed to the publication of nursing models and theories by influential nurses such as Dr. Peplau, Jean Watson, and Martha Rogers.
Step-by-step explanation:
The birth of nursing theory can be attributed to several influential actions in the field. One key action was the publication of nursing models and theories by notable nurses. Among these, one significant publication was Dr. Peplau's nursing model, which emphasized interpersonal relationships in nursing. Another important publication was Jean Watson's Caring Theory, which focused on the holistic care of patients. Additionally, Martha Rogers' work on nursing theory, specifically the Science of Unitary Human Beings, contributed to the development of nursing theory.