Crow Boy by Taro Yashima and A Hundred Dresses by Eleanor Estes are modern classics. Told from the point of view of a child who witnessed the mistreatment of another, these are stories of remorse.
In two of his picture books Uri Shulevitz introduces a child alone in a room, isolated, similar to our quarantined children today who are stuck at home, cut off from friends. But where is the iPad, television or computer screen? Look closely—there are none in the pictures.