Final answer:
Modernist writers focused on controversial topics such as racial politics and feminism, while also challenging traditional morality and experimenting with form and content.
Step-by-step explanation:
Modernist writers focused on several controversial topics that were prevalent during the early 20th century. One major topic was racial politics, which was highlighted in Jean Toomer's 'Cane' and the works of authors like Ralph Ellison and James Baldwin. Another important focus was feminism, influenced by the Women's Suffrage Movement. Modernist literature also challenged traditional morality and social values, often critiquing the hierarchical structures of society. Furthermore, modernist writers experimented with form and content, pushing the boundaries of storytelling and language.