Wrote the book "How The Other Half Lives" in 1890.
In 1877 he took a job as a police reporter for the new york tribune. through his experiences as a police reporter, he worked in the most crime infested, lowest of slums. through this he wrote through the eyes of people living in these slums in an attempt to make a difference. After reading his book "How The Other Half Lives," Theodore Roosevelt like it so much he had to meet him, and thus coined the term "muckraking journalism." making Riis a prime example of muckraking.