Written in 1643 at a time of great turmoil between Native Americans and the English settlers, A Key into the Language of America is a study of American Indian life, religion, and language. Written by an advocate of Native American rights and treatment, the book presents a number of ideas that seem anti-English and bring to light the prejudices held by the pilgrims. The book was the first study of Native American language written in English, and the commentary on Indian ways of life make it a worthwhile read. Roger Williams (c. 1603-1683) was the founder of Rhode Island and an outspoken pioneer who fought for Native American rights in New England in the 17th century.