Henry Bailey Stevens (13 July 1891 – 16 March 1976) was an American author, playwright and vegetarianism activist.

[1] Stevens married Agnes Ryan, the managing editor of the Woman's Journal, in 1915.

[1] In 1917 Stevens and Ryan resigned from the Woman's Journal, due in part to their opposition to World War I, a belief not generally shared by the suffrage movement.

[2] Stevens directed the University of New Hampshire Agricultural Station and Cooperative Extension Service from 1918 until his retirement in 1956.

The book argues that early humans made the mistake of changing from vegetarianism to flesh-eating and that soil erosion, starving peoples and war is the result.