Hart Merriam Schultz, also known by his Blackfoot name, Lone Wolf (Nitoh Mahkwii or Ni-tah-mah-kwi-i), was an Indian artist of the twentieth century.

[3]: 157  With his father's frequent absences as a guide through Glacier National Park, it fell to Lone Wolf and his uncle, Last Rider, to run the family ranch.

When he and a classmate beat up a priest who was attempting to enforce corporal punishment on Lone Wolf, he was expelled, and returned home to the ranch, after which his parents decided to temporarily forgo a formal education.

With his mother's death in 1903 he left the ranch and traveled south, finally ending up near the Grand Canyon, where he worked as a cowboy, wrangler, and guide, as well as continuing to practice his art.

[8] After his brief stint in film, due to the influence of Thomas Moran, he studied art at the Los Angeles Artist Student League.

He was influenced and encouraged by Thomas Moran, who he met during his time wrangling at the Grand Canyon, and his style has been compared to that of Frederic Remington and Charles Marion Russell.

"[5] In that article, Vance Thompson said of Lone Wolf, "The message he has to give is his own; and already he has shaped – if he has not perfected – a distinct, individual and interesting technique.

I have seen the young painters pass in droves through the schools and salons of Paris, and in 20 years I can claim to have been the discoverer of only one great artist.

Now I like to think that I have, at last, discovered another and he is an artist who has authentic vision, sincerity and a brush which is already capable of doing precisely the thing he wants it to..."[5] In 1918 his father authored Bird Woman, a novel about Sacajawea, and dedicated the book to Lone Wolf, who provided the illustrations for the novel.

Some time was also spent during the winters in Tucson, when Lone Wolf would occasionally participate in the La Fiesta de los Vaqueros festival by dressing in traditional Blackfoot regalia and riding horseback in the parade.

"[13] The photojournalist, William van der Weyde said that Lone Wolf was "young, courageous and loves both his art and his race.

He would sell his art to European royalty; to presidents Herbert Hoover, Theodore Roosevelt, and Calvin Coolidge; and to other notable people such as Buffalo Bill Cody and Charles Russell.

[10] In 1956, he gave an interview which was captured on tape, wherein he discussed his growing up in Montana, and learning to paint at the hands of the elders of his mother's tribe.

His body of work helps to understand "the significant contributions by marginalized artists who successfully negotiated the terrain of the mainstream art world.

[20] Two years after his death, his story was highlighted, along with pictures of his paintings and sculptures, in the first issue of the 1972 edition of Montana The Magazine of Western History.