Answer:
Lincoln Steffens wrote about corruption in municipal government in different cities of the United States.
Step-by-step explanation:
Lincoln Steffens was a Muckraker of the progressive Era in the Early 20th century, he was also a leftist and a world-class researcher that had very nice connections in the municipal government of different cities which helped him to reveal certain corrupt nets and the wrongdoings of influential personalities in the seek of justice and morality, civility, and righteousness. He wrote different books and articles to narrate his researches and the events related to them