Well, Stephen R. Haynes and Lori Brandt Hale, in their book Bonhoeffer for Armchair Theologians decided to begin at the beginning of Dietrich Bonhoeffer‘s life…

Many recountings of Bonhoeffer’s biography begin at at the end, suggesting that the meaning of his life can only be comprehended by looking backward from his anti-Nazi resistance, imprisonment, and execution.  But wee will attempt to view Bonhoeffer’s life as it was lived–from beginning to end.  It started in a relatively idyllic time when terms such as “world war,” “fascism,” and “genocide” were not yet part of the European lexicon

(Stephen R. Haynes and Lori Brandt Hale, Bonhoeffer for Armchair Theologians, 1).