Describe the understanding of some aspect of American Literature and history and how it has changed since take the course

Describe the understanding of some aspect of American Literature and history and how it has changed since take the course. Please refer to these 3 texts.

"The yellow wallpaper", by Charlotte Perkins Gilman

"The strange case of Dr. Jekyll and Mr. Hyde", by Robert Louis Stevenson

"The Sun Also Rises", by Ernest Hemingway

Please relate this 1 page paper to the class descriptions i have listed down below

The 1880-1919 period in the US saw technologoical, scientific, demographic, and epistemological changes unprecedented in history; the conquest of age-old diseases, the mobilization of a multi-million-man army along largely meritocratic lines, and the Great immigration from southern and eastern Europe that made the country significantly multicultural and urban. These developments fundamentally transformed the terms of human experiences and idientity. Modern American literature registers and dramatizes these shocking changes.