The book of Ruth, traditionally read on the upcoming holiday of Shavuot, contains no reference to sin, divine retribution, repentance, or other typical biblical themes. It is, Sarah Rindner writes, “unusually sweet,” its narrative built on acts of human kindness: the title character’s devotion to her former mother-in-law Naomi, Naomi’s devotion to her, and Boaz’s kindness to the two of them. Examining the numerous implicit references to other biblical books in Ruth, Rindner elucidates the message:
Goodness prevails in [Ruth], but not at the cost of totally effacing the tragic qualities that are present in both life and the Bible. . . .
[A]t the start of the book we learn that it takes place “in the days when the judges judged,” a direct allusion to the book of Judges. Judges depicts one offensive or ugly event after another, with increasing intensity, until the book concludes with [a] statement [that has appeared thrice in the preceding chapters] linking this state of affairs to a lack of central political leadership: “in those days there was no king in Israel, every man did what was right in his own eyes.” Although the book of Ruth is set in this historical moment, the lack of centralized political authority does not prevent its characters from displaying responsibility toward one another and fulfilling lofty ethical imperatives.
In the end, the book also invokes [the imminent arrival of biblical] kingship—due to Ruth and Boaz’s virtue they merit to be the progenitors of the Davidic dynasty. It thus represents a counter-narrative to the book of Judges—it presents kingship as a consequence of a chain of goodness, not as a Hobbesian solution to the people’s moral depravity.