Percy B. Shelley's "Vindication of Natural Diet" was first written as part of the notes to her earlier work "Queen Mab," which was privately issued in 1813. Later in the same year the "Vindication" was separately published as a pamphlet, and it is from this later publication that the present reprint is made. The main object of Shelley's pamphlet was to show that a vegetable diet is the most natural, and therefore the best for mankind. It is not an appeal to humanitarian sentiment, but an argument based on individual experience, concerning the intimate connection of health and morality with food.