"The Simple Life" is a philosophical work written by Charles Wagner, a French Protestant pastor, and social reformer. The book was originally published in 1901 under the title "La Vie Simple" in French, and later translated into English. Charles Wagner was a prominent figure in the Social Gospel movement, which emphasized applying Christian principles to social issues and promoting a more equitable and compassionate society.

In "The Simple Life," Wagner explores the idea of simplicity in various aspects of life, including material possessions, relationships, work, and spirituality. He advocates for a life that is focused on essential values, kindness, and a deeper connection with one's self and others. The book encourages readers to reassess their priorities, emphasizing the importance of inner fulfillment over external wealth.

Wagner's writing often reflects his concern for social justice and the well-being of individuals in the face of the challenges posed by modern industrial society. "The Simple Life" has been considered a classic work that inspires readers to reflect on the nature of happiness and the pursuit of a more meaningful and purposeful existence.