Unto This Last" is a book by John Ruskin, published in 1862. It's a collection of essays that explore Ruskin's social and economic philosophy, particularly his critique of industrial capitalism and his advocacy for a more just and equitable society. The book's title is taken from the Bible, specifically the Gospel of Matthew, and it reflects Ruskin's belief in the importance of considering the needs and well-being of the "last" or least fortunate members of society.