What is the most important events in the first half of a child called it?

In "A Child Called It," the most important events in the first half of the book include the escalating abuse suffered by Dave Pelzer at the hands of his mother, the deterioration of his family dynamics, and his struggle to survive and maintain hope despite the extreme cruelty he endures. These events set the stage for the remainder of the book, illustrating the resilience and strength of the human spirit in the face of unimaginable adversity.