In the early twentieth century, how did American literature change in terms of the writers who contributed to it and the range of subjects it addressed?

Explanation: American literature in the early twentieth century reflected changes in the way he wanted to translate his writings giving them a more social sense and deepening more in the lives of rich and poor. And shaping what was experienced in the Industrial Revolution and the hardships lived after the war. This change accommodated the innovation in terms of arguments. Police novels had a great boom, just like black novels where social criticism was felt.