The theme of Ruth may be summed up by the word “redemption.” Gleason Archer writes, “Perhaps most important of all, this brief narrative is designed to exhibit the function of the…‘kinsman, redeemer.’” [A Survey of Old Testament Introduction, 267.]
Additionally, there is an emphasis placed on the fact that Ruth is a foreigner (1:22; 2:2, 6, 10, 21; 4:5, 10), thereby illustrating the fact that Gentiles are in the overall plan of God as well as His chosen nation of Israel. It is also important to notice that Ruth became the great-grandmother to David, and consequently an ancestor of Jesus Christ. [Paul Enns, Ruth, 13-14.]
And while the typology of the book may not be considered a theme, it is most certainly an important aspect in the book of Ruth.
Read more about the book of Ruth here.
Words of Grace 