Sylvester Graham, American minister and activist (died 1851)

Sylvester Graham was an American Presbyterian minister and dietary reformer. He was known for his emphasis on vegetarianism, the temperance movement, and eating whole-grain bread. His preaching inspired the graham flour, graham bread, and graham cracker products. Graham is often referred to as the "Father of Vegetarianism" in the United States of America. Graham's lectures caused riots on multiple occasions.